I have been dealing with what I think is anxiety for a few months now. I have had few panic attacks, 2 which have sent me to a hospital. Recently, even though I have been able to fall asleep, I find it hard to stay asleep. when this feeling gets worse, I feel shaky and have this nervous feeling in my stomach. I sometimes have trouble breathing. My heart rate goes up and down from 80 to 120 sometimes. I don't know what exactly is happening but I would like to know