I am an 18 year old boy.. I have been having many episodes of shortness of breath for the past 6 years did to anxiety. It's not there all of time, but when it does come, it can be really frightening. For example, last night, my shortness of breath started at 11:30pm and it lasted to I slept at 1:30am. I even woke up several times during the night and immediately the thought of shortness of breath came and I had to breath harder.

I have went to the doctor before and he said that everything was OK. I try breathing exercises but they don't really help. I really want to get rid of this shortness of breath feeling once and for all. Any advice?