Intolerance issue? Helpppp!

I have had irregular movements since As long as I can remember. Stressful situations caused loose stool and any other time they would be stuck. I did not realize how screwed up they were until I went gluten free when I was 17. I went gluten free for 3 months and it was the most regular I had ever been.

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Fast forward to this year I just turned 20. I had bloody bowel movements from july till December with no associated pain. I decided to go gluten free again. They stop being bloody within one week. I made an appt to see a GI doctor in november but they couldn't see me till now. So I go in and she says she wants to do a colonoscopy since we have a lot of polyps and colon cancer in my family. So I have scheduled one and I read that if you change your diet it can mess with the results. So three days ago I started eating gluten again to keep from getting inaccurate results. The first day after eating gluten I felt like I was dying with hot sweats, abdominal cramping, loose stool, nausea and fatigue. Yesterday I had a sandwich and thought I was going to vomit and had a super bad migrane and then I had blood in my stool again. I told my mother (who is a nurse) all of this and she still does not see the correlation. The doctor doesn't think that it is enough proof to do an endoscopy to see if I have celiacs... I got my blood taken and tested again today and wont know the results for a week. However it may be a false negative since i have only been eating gluten for two days. Am I crazy for making the association between my GI issues and gluten/wheat?

Also my dad has had bowel issues forever an they just said he has IBS and when he drink beer with wheat he has an allergic reaction (gets itchy and bloated).

I have been blood tested for celiacs once when I was 17 and first noticed the correlation, however I was gluten free at the time and they came back normal. I am also borderline anemic 0.1 point away from being considered anemic and have been since I was 8.

I have plans to see a naturopathic doctor after my colonoscopy and hope to get the Cyrex testing done to see if maybe it is some gluten or wheat antibody they aren't testing for at the GI doctor. I also really like the taste of gluten so I dont want to stay gluten free forever unless I know for sure it is what is causing it and not a reaction to something else that gets cut out while cutting out gluten. I dont eat cheese or milk either, im not allergic I just dont like what it does to me.

So my question is if anyone has any ideas what could be causing these symptoms or if anyone has had similar ones. If so what did you do to figure it out? Im really tired of feeling like s$#& and not having any of the doctors believe me. Any advice is greatly appreciated!