I just read this post so I'm sorry it is belated but I have said a prayer for you. As everyone said, please take care of yourself, try to relax and keep positive thoughts. I read a tip a while back that seemed so simple that I didn't think it could work but it does help me. It said that whenever you start worrying about something, to mentally give yourself permission not to worry about it right now and to instead agree with yourself that you will worry about it later instead. You can even set up a time to "worry" if that's what you feel you need to do, but for me I simply agree that I am just not going to worry at the present time about this particular thing (whatever it is).
I know it sounds silly but somtimes I also silently recite a little "don't worry" song to myself like "Don't Worry, Be Happy."