I’ll try to answer as best as I can right now. It’s complicated and very recent.
I really don’t know much about twin flame theory, I only stumbled upon it trying to figure out this situation. I do know a good bit about coincidences however.
The difference between coincidences and synchronicity is key here. Coincidences can be manufactured pretty easily if someone has an agenda and knows you psychologically. Synchronicity however (coincidences with profound meaning,) are harder to manufacture; unless you have a pre-conceived idea in your head. Then coincidences can seem like synchronicity. The reason I say it’s complicated, is because this involves a lot of both.
Say someone was in a position of psychological power, like a counselor, a priest, someone claiming they can “heal” you for money. You divulge some pretty detailed trauma from your past that you’re not quite over as well as your history with synchronicity and astrology. You find out soon after this person does not seem to have your best interest in mind, is badmouthing you to his peers, seems unhealed himself and is not qualified or intending to offer you anything of actual benefit. So, you leave. You don’t call them out in public, you just turn your back and move on with your life. They don’t; they are insulted to the core of their being and develop revenge fantasies. They stalk your social media for years. They know you’re really obsessed with music. Like, it’s one of life’s “safe havens” so they use that to target you. They are independently wealthy and pay your favorite artist to write songs about you… for years. You don’t even notice at first… Then all the sudden when your relationship is falling apart, you start to notice this person seems to be into you, like a lot. There’s a whole album title begging you to be a part of their world. You go to a concert and find them staring at you, you instantly recognize them and your eyes lock. It all seems magical and “meant to be.” The songs get even more personal so you listen more and actually invest time in really considering this a possibility, but you also feel deep down, something about this feels off.
You feel like something is happening that’s way bigger than you, like you ARE going in the right direction in some regards, so maybe this is real, maybe it’s not, but YOU are growing and changing quickly. The synchronicities are making it feel real, because you’re used to them and now you have a theory to “explain them.” (maybe not.) The astrology adds further confirmation to the theory. You actually encountered 2 mating red foxes during a cazimi and several renegade birds starting the same year you discovered this person’s music. You thought that “figuring out” what was going on during the eclipse was an auspicious sign. In retrospect, you see that eclipses show what’s hidden, sometimes hidden motives. (You can’t take everything at initial face value with this stuff. Context matters. Hindsight is 20/20.)
There’s other coincidences you read on the forums here that apply to you. Oh, maybe this gives reason to the several deaths, DNOTS and personal growth you’ve recently experienced. You’ve started taking way better care of yourself, lost weight, cut way back on drinking, and developed more self respect and better boundaries. Those are coincidences, not synchronicity. Confirmation bias made you group them together because it fit the theory.
There’s no communication. After coming across this TF theory, well that’s just part of the process so you dismiss it for like a month at which point you’re questioning what the hell is happening. Now other artists are making references to you and him in their music.
You’re a pretty private person who doesn’t like being the center of attention so you get pretty weirded out and defensive. They get a glimpse of your skepticism, it hurts their ego, so they talk a bunch of trash about you online, showing their true colors and intent. They start triggering you on purpose now in their music, however the new “triggering content” has a signature you can’t unsee. It’s instantly obvious to you at this point who was behind the whole thing; the guy you turned your back on 6 years ago. The maturity level of the content and projection from this individual is what in part gave it away. Then the songs from other artists about the fallout confirmed the truth.
You feel lucky you didn’t fall for it. You never even contacted this person, but it still sucks.
You still have a LOT of questions. Who else did they pay off? Why did you find these rare twin crystals? Are you a twin? You did feel some heart chakra stuff and your body felt different, but maybe that is just dopamine?
You regulate your nervous system back to normal and feel embarrassed to even have entertained the idea. Autonomy. You are OKAY because you know you are moving the hell away soon to a better place and you’ve dealt with things like this your whole life. Just another chapter in your incredibly weird life. You’d like accountability though so this person leaves you and others alone in the future. They think they are in a spiritual war with you; but you know they are in a war with themselves and the higher powers now.
Hope this answers some questions. 
I’m glad you’re not in any similar predicament! I’m just here to warn others that may be tricked into this, you seem to have a completely different situation. I’m happy to hear others share the same quirky synch, and I love the “huckleberry” one because it is a very unique and uncommon word which makes it more special. I hope it magically works its way back into your world some day!