Since yesterday I have been suffering with an overwhelming sensation in my chest due to my heart rate being up and down. So basically I had 2 cups of coffee in a row, unintentionally, the second one was given to me without my request so I didn't want to be rude and not drink it. So anyway, after a while I began to feel very weak, my eyes felt droopy, my heart rate started to rise and I felt a very tight feeling in my throat, I coped with it and let it wear off, but in the evening I started to feel sick like I'd just got off a ride (not so much dizziness though) and again my heart beat began to elevate. I couldn't sleep because the feeling was to over whelming, I wanted to be sick but it wouldn't come up, I kept checking my pulse regularly but It reached 100 at its highest but that's average right? (60-100?) and its not irregular either. Iv barely slept and the thumping in my chest keeps returning, it comes in waves. I'm not worrying myself at all in very calm but I just want to feel normal again. Surely the coffe would be out my system now? It's been over 24 hours. Im 17+ by the way if age makes a difference.