Gastric Bypass and Celiac?

I have always had stomach issues. For as long as I can remember the cramps the loose stools the gas you name it. My mother took me as a baby and the doctors told her I was allergic to milk. She didn't believe this to be the case and gave me milk anyway. I do think I have sensitivity to milk but not always it is typically hit or miss. Anyhow, after bringing up my issues to doctors over the years they all basically told me this was "normal for me" since I had always had these issues. I always thought it was an IBS kind of thing but in the last few years many of my family members have been diagnosed with Celiac disease and my oldest son recently came to me with all the same issues that I had as a child. OK so I had gastric bypass surgery a few years ago and I did great when I wasn't eating pastas and breads. Then I came to a point where I wanted to incorporate those things into my diet again and slowly I had ended up with that as my main source of food because they don't make my stomach pouch feel horrible and full like meats do. So I went to my doctor and told him about my symptoms and he told me that "because of my gastric bypass it can't be celiac" and that the area of the intestine that is associated with Celiac was basically removed. Now I looked this up and it doesn't sound right to me what my doctor told me. I just moved and have an appointment coming up but I wanted to know if anyone else out there had gastric bypass with celiac whether they were aware of the Celiac before or after the weight loss surgery? And what you are dealing with having had the surgery and celiac? I was also told that Celiac doesn't cause stomach pains. I can't really find anything that says yes or no but I know the gas definitely causes me pain and a lot of it but that isn't all the pain. I also need to know what words I can say to my new doctor to make him truly understand what I am going through since nothing I have said over the years seems to spark any interest. I have even asked for Celiac panels. Help