I want to know what is causing me to get episodes where i feel terrified . And I cant breathe. i start freaking out and crying if i have to go somewhere .My heart starts racing really fast feels like im going to have a seizure Im having bad headaches. And Im starting to pass out or black out. I normally have low bloodpressure already but its real low. I am a 41 year old female . I weigh 120lbs. Im not allergic to anything but am an ex drug addicted. And may have a mental disorder. Also the symptoms like the dizziness become worse when im on my period.