My wife suffers from anxiety and is under a doctors care for it but it always seems to be the same. She went through a really bad time for awhile and the she finally started taking a simple anxiety pill that is inexpensive but it works when she has her worse symptoms. Her main problem is she worries all the time about
her health. Every new ache or pain that she gets she seems to think that it is going to kill her. When she was at her worse everytime I went out of town she called an ambulance to pick her up. they never could find anything wrong with her but she keeps insisting that she is dying. I am not sure what these pills are but they have done wonders for her.
My wife just had a endoscopy to check out her stomach and as usual the doctor found nothing. However, the doctor did advise her to start taking sustenex (probiotics) and has really helped her so maybe since the immune system is mainly in the digestive tract (70 %) you should try this also and maybe it will help you. It is available in Wal-mart and it does seem to make you feel better (I now take it too). Best of luck to you.