i would get anxiety and that shit from long acting test cause of water retention. i use only test prop now and have no issues even up to 900mg ew. sometimes i do feel my hb harder but, bro, your heart is not going to stop. until you get your head issues straightened away and relax i suggest stopping. because stress and worry, you could actually give yourself a heartattack by worrying. not from the test. go get a bp monitor. get an automatic digital omron brand from walgreens with large cuff if you have bigger arms. this will tell you whats up. but you need to relax for 15 minutes and take a series of tests and average them. if your bp is somewhat normal, and hr is normal, then it's in your head. and i've been there, to the point i was giving myself atrial fibrillation from stressing everytime i stuck the needle in or felt my heart beat, i was a walking panic attack, and i kept thinking it's the juice it's the juice, it even happened to me off the juice on igf, and im thinking wtf is wrong with me, but it's all stress in your head man. now i'm running test prop 100mg ed, tren ace 80mg ed, 30mg npp ed. and have no issues whatsoever. bro, i went through every test imaginable thinking my heart was all messed up and they're scratching their heads, it was stress, worrying about if the juice will hurt me, worrying about school, worrying about work, wife, kids, money. then when i realized i cannot do this, juice or not, i cannot be stressing, and just came up with this new thing i call, I DONT GIVE A FUCk, i have no problems man.