I am sorry to hearthat you cannot afford to have blood tests.
There are a lot of free clinics available, some through religious
organizayions such as churches etc. I am posiptive you can find
one in your neighborhood.Doctors volunteer their services and
they enjoy helping people like you.
Be thwt as it may, the simplest thing you can do is go on a very
FreeDiet".The fact that you are using internet, I am
sure you can look up Celiac disease
foundation website for
guidance about the diet.I can assure you that you are not seeing
pieces of intestine in your stool.
Wish you the very best .
Hope you will follow through with my suggestions.