My stomach stays tied in knots, my heart will race and every time I have one I automatically think I'm having a heart attack and that I'm gonna die. My Dr has me on 1 and 1\2 mgs xanax a day but they don't seem to be working anymore, and 50 mgs Zoloft. I'm so tired of being scared. Is there anything I can do to get them under control? Thank you .