Get an IgG food allergies blood test and a stool test from great smoky mountains lab. However, if your doctor doesn't believe inflammation can cause your symptoms, then he'll consider the stool test a waste of time and won't interpret it correctly. However, you can take the stool test results: http://www.gsdl.com/home/news/connections/vol9/conn20000906-p.html
to an appropriate doctor, if your conventional doctor thinks your talk of candida is hooey.