How to cope with sever anxiety dissorder

I started having symptoms of what I thought was a heart attack just a week after my second daughter was born. I kept going to the er where they dis ekg's and other tests and said I was fine then sent me home. This happened over and over and I completely fell apart. I honestly felt like I was going insane! I went to a heart doctor and they did an ultrasound on my heart then told me I had a strong heart. I finally went to a psychiatrist where I was diagnosed with extreme anxiety/panic disorder and put on klonopin and a anti-depressant. The antidepressant made me feel weird had had awful side effects. Like I was unable to climax and that was not ok with me! I to this day have extreme anxiety with such effects as: rappid heart beat, sweats, blurry vision, feeling uneasy, trouble sleeping, afraid of dieing, fainting spells, trouble thinking straight, pain in my left arm, agitation, a need to pace etc.... I can't stand this feeling! The Dr appointments are expensive and I don't have insurance! I am going on 7yrs of this and am feeling so helpless! How have others been able to deal with this when they can't afford to go to the Dr?