I've been taking omeprazole for about 3 weeks now for acid and it's not really been helping. Last week I had some really bad stomach cramps which have gone but ever since I've been having really on and off loose stools. This morning woke at 4am feeling strange and panicky and have been to the toilet twice and I won't get too descriptive but stools were loose and really odd looking. I'm 53 and so worried there is an underlying problem of bowel, pancreatic or some other cancer. I've suffered HA in the past but really had it under control but these symptoms are terrifying me.