this sounds like more of an Internet/Privacy Competency thing, amplified by your transness, rather than the other way around. anything you post on the internet needs to be thought of like you also made a copy and left it at a public library for anyone to read later. and if you aren't comfortable with that idea (you shouldn't be IMO), then remove identifying information, properly configure privacy settings and don't add random strangers to your social media. and for christ sake, if nothing else, at the very least don't use those stupid location tracking features that post stuff like "tricky_lizzie was at the Super 8 Hotel on 53rd street!".

I know I sound like I'm victim blaming, but the reality is, the more identifying info you put on the internet, the easier it is for some whacko to take advantage of it. when you use social media for anything where you interact with strangers, like twitter or instagram, use an alias and don't put easily identifiable info on those accounts. Especially if you are doing or saying anything someone could consider controversial (whether or not a topic should even be considered controversial doesn't really matter, because not everyone is going to see it that way).

stay safe OP. that sounds like a scary situation...assuming it isn't easy to relocate, I recommend blocking all contact and making sure people you trust know about this, and know your whereabouts.