Had Biopsy. Advised Might Have Coeliac's Disease Later. Had Constipation. Having Uncomfortable, Distended Stomach. Coeliac's Disease?

Hi! I had a biopsy last year and six months later the hospital wrote to me and my GP to say that I might, in the future, develop coeliac s disease. Presently blood tests so far say that I am not coeliac at the moment. However, I am really suffering when I eat the usual gluten culprits and for the last two weeks I have had severe constipation (have suffered with constipation over the years and treated it) unlike anything I have ever had. No amount of usual laxative, vegetables, drinking water etc relieved the discomfort or made me go A trip to the doctor a couple of days ago: impacted motions. I was prescribed movicol, and, although I have gone a tiny bit, my tummy is still uncomfortable and distended. Could I still have coeliac s, despite blood tests to the contrary? Many thanks for any help or advice you might be able to give me. TMW