Ever since I was a teenager I've been prone to mouth ulcers. Then I started getting swollen, inflamed gums. Dentist couldn't find anything wrong, kept everything clean, no infections etc but I realised they'd be fine at the beginning of the day but would be throbbing by the end, like I was reacting to something I was eating throughout the day.
A few months after that started happening, I had trouble with bowel movements. Tummy cramps, urgency, wind and pain/bleeding when I went. Saw the doctor many times over the next six months. Was prescribed laxatives and creams and told to eat lots of fruit and veg. I felt they were treating the symptoms and not looking for a cause as my diet was fine and I wasn't constipated at all.
I consulted Doctor Google and stumbled across a randomised controlled trial that found a link between bum problems like mine and undiagnosed food intolerances. So I tried cutting out dairy for a few weeks, no effect. Then I cut out gluten and all my symptoms went away. The tummy troubles, pain and bleeding, all gone but also the ulcers and gum inflammation which I hadn't realised might be linked.
I was gluten free for five months before I thought I should try reintroducing it, see if it was just a coincidence. It wasn't. All the symptoms came back worse so I went to the GP again and told them all the above. I was sent for blood tests including the coeliac blood test. I ate gluten for 6 weeks, then went for the test. All my results came back fine. The doctor said I could be intolerant but not coeliac, said I should cut it out again and, if my symptoms go away, I've got my answer.
Well that was almost two years ago, I've been gluten free ever since with no problems except two occasions when I think I was glutened by a supposedly gluten free takeaway.
Though, whilst my coeliac blood test came back "normal" I think it's wrong. There's a large number of false negatives with the blood test as many coeliacs also have IgA deficiency which means they don't make much of the antibody the blood test is looking for. I've since found out the actual number of my test result and it was such a low result they should have suspected IgA deficiency and ran further tests. That didn't happen and now I really don't fancy eating gluten again for 6+ weeks to have further testing.
So that's my symptoms (though symptoms do vary, everyone's different). Go and get tested but, if the blood test result comes back normal, do ask about IgA deficiency and push for a bit more testing. Just to get it properly ruled out so you don't end up with a big-fat-most-likely-false-negative like me.