anxiety
"I started getting anxiety about a year ago out of the blue. I had to go to the ER because I thought I was dying or something.  All my tests came back negative. The doctor told me it was an anxiety attack. I got sent home with nothing. A few days later I had another one. I went to my PHP and put me on clonazepam. I try not to take them if I don't need it,  but you never know when it may manifest.  So I try to take half doses to make my script stretch and to also not be as dependent.  I noticed that it works but to a less degree.  I commute to school and work a full time job so my mind is always running. In a nutshell, this medication works."