Chronic iron deficient anemia

I have had a serious problem with anemia for over 7 years. When I went to the doctor my hemoglobin was 4.5 and that is when they started testing. I did iron infusions to correct the lack of iron and my blood count came back up and this proceedure has continued since then about every  8 month to 1 year. I have had a colonoscopy serveral times as well as a small bowel study and endoscopies. they always find nothing but the last time h-pylori and i did the treatment for that which about did me in.  I am at a loss and now have found an iron suppliment that i have just started taking to  keep me from getting so low but feel sure that somehow they are misssing something in my diagosis. My doctor just 2 weeks ago says that there must be cancer or some chronic disease. I am waiting now for another appt at a GI doctor to start tests that i really do not want to go through again.  if anyone has any ideas please pass them along.

alleycat05