I know that here I am pretty loud and obnoxious, but IRL I actually have like, really bad social anxiety. Especially when talking to guys. (Actually come to think of it it's usually only happens when I have to talk to guys I find attractive 
)
Sometimes it's fine, but other times it's like my brain does a blue screen of death and I can't even think of words to say.
Is there a way to get my brain working normal in these situations? I already taken anti-anxiety meds and they help a little, but not always.
Any tips to stop my goofy ass brain from crashing?
Ah damn I'm sorry they didn't work for you! I was mostly just suggesting in case you hadn't tried since it seems to work so well but of course, mileage varies.
I think as others have said, body doubling and doing an activity together with someone can help a LOT, I know I'd rather play a board game/go to a movie/go on a walk or bike ride and so there's not pressure to talk the whole time.
Idk if having a fidget would help, but I have one of those fidget rings that I wear and it's pretty helpful for me/discreet