verry important question, please help!!

For the past year I have had the worst symptoms of candida (so I thought). Dry itchy skin, rectal itching/burning, extreme fatigue/depression, muscle/joint pain, white bumpy tongue, etc. All of these symtoms came out of nowhere, after a heavy bout of Antibiotic use. I have been treating myself for candida with no success. My naturepath recently had me submit a stool analysis to the great smoky lab and the results came back negative, no yeast what so ever. I recently purchased a family pack of three lac, but now I guess I don't need it. Can I still return it?

Also, if it is not candida what is it? My MD suspects crohn's disease and is checking me for it. I have also heard alot about nanobacteria lately, many of the same symptoms of candida are related to nanobacteria, but nanobacteris is extremely difficult to detect. I am wondering what it is thats wrong with me, I want to get better ASAP! Does any one have any input?