Hello there, im sorry you have to be having these heart and twitch feelings. I can tell you from little anxiety experience(just started having bad anxiety and panic for last 2 or 3 months) that anxiety can really make you seem like there's something wrong, on a daily basis i feel my chest tighten up and lightly burn feeling and also some quick pains through my stomach chest and arms. and also when i wake up i feel like my head is going back and forth quickly. I too got pretty good at realising it is anxiety and it kind of calms me down. but i still feel those symptoms even though their not harmfull or anything... I started taking Celexa coming up on 3 weeks along with ativan just for when i feel any panic coming along and i can say it worked wonders for me, even though the full affect doesnt kick in for another 2-3 weeks. and i never wanted to take medication but when i did i started feeling better quickly, first few days or week were rough since the med made me not be able to move or want to go outside, but after it settled in i love being outside and can function again. i would reccomend Celexa to you because i feel better on it and theres some other good forums on it on sites. but everyone has different medications that work for them so you could give any a try until you find the right one. And it does make you drowzy for the first couple weeks but if you have a sub drug like ativan or something like it to hold it off it helps alot too, like i said im kind of a newcomer with anxiety and panic but it feels like i learned alot and had good support from this site. Good luck on everything and i know you can find something out there. Ty