I need some advice. I've been dealing with some pretty bad intestinal problems for the past 4 years and we thought it was a wheat allergy but i began having problems no matter what I did/ate.

My symptoms are severe abdominal cramps, bad gas, diarrhea (occasionally bloody). My body keeps switching between having bad diarrhea to where i spend hours in a bathroom to being so constipated i wouldn't have a bowel movement for about 1 week.

My family on my dad's side has a history of different tumors and cancers and all sorts of bad stuff. My grandmother does have a wheat allergy which is what we thought i had originally.

My doctor wants a stool sample, she actually sent me home with a sample collection kit. But each time i try to get a sample i get contsipated for another week.

Within the last few days its gotten worse. My stomach is now tender to the touch, almost like when you touch a bruise. I have no idea what it could be, it makes me concerned with my family history for tumors/cancer, does anyone have idea what it might be? Any idea would be appreciated.