My story of anxiety

I'm a 34 y/o female. I've dealt with anxiety since I was a kid. Afraid my mom would die (she was I'll most of my life), afraid of my dad abandoning me, afraid of intuders and ghosts, of being kidnapped and of not being liked. I've never classified myself as having GAD until recently.
I've been through a few experiences that gave my PTSD. I'm more jumpy now than I ever was. Not to mention, I have 4 girls under 13 that push my buttons Every day. I recently had my first anxiety attack about 2 months ago and went to hospital cause I thought something was wrong with my heart. I felt weak, dizzy, heart racing, chest constricting, felt like I was choking, quick evacuation of bowels, and humming in my ears. I felt better after they gave me Ativan. But after that day, I've had other attacks and have almost a constant construction on chest and chest pain. Dr says I'm healthy and tells me I have an anxiety disorder. I'm trying to control it naturally doing exercise, doing house work when feel symptoms, and just started St.Johns Wart. Heard it could help.
Just had my first anxiety attack at a store and tried calming myself down. Now I'm worried that I'll have one anywhere I go. I also obsessively worry about silly things. If someone tells me the truth, that a demon might take over my body, that my kids will be kidnapped if they leave my house, worry about being late to anything. I could go on and on.
I'm new at these physical symptoms of anxiety and would like to talk to other with my problem. I dint have anyone who understands me.