I went for years to gastro docs trying to find out what was wrong.
IBS-Gastritis- food allergies -Tagemet, etc etc etc.
What was happening for me is the toxins were building and soon there was one drop too many toxins in my body and which was the tipping point that sent me into a healing crisis which led me here only after doctors had almost dropped me at death's door with all their medications.
Let me just say I am no expert but w/o dropping names there are a couple experts around here, find out who they are and read their posts.
I started doing cleanses but that may be too hard for you right now.
coffee enemas helped in clearing my liver which was plugged to the point of inflamation-not good because I have hep C. I soon discovered as it cleared I could eat foods again without a reaction...ie. avacado. I did a lot-they helped a lot.
Rife has helped me get rid of many parasites, lyme (which I didn't know I had) quite a shock at first, and cont to be my method for lightening the toxic burden
along with chelation.
Heavy metals are why parasites thrive and candida for that matter too.
I changed my diet. I ate lighter. I quit this and that, I rifed and i've lost 35 lbs I can eat foods that I couldn't eat in years, my mind is coming back but I still have bad days/nights but if I can say one thing, everyone is different, do the research, so much here on this site, and do what you can.
and good luck