Hello, I Have GERD Disease, Which Recently Flared Up And

Hello, I have GERD disease, which recently flared up and so 2 weeks ago I went on Omeprazole. The health worry cases me huge amount of anxiety, I mean huge. Needed also to go on anti anxiety medication. My bowel movement has changed, I hardly eat now, yet need to use bathroom for bowel movement twice a day at least and almost all the time hear some " noises" and small cramps in my stomach. The biggest worry is that my stools are lighter in color and the more I worry- the looser they get. Not a diarrhea, but kind of loose. A couple of days ago I had a bit more normal bowel movement with stool medium brown, but now is pale again and looser. I am worry sick. Please help.