I am having a pain on my right side just below my rib and travels around to my lower back. Any ideas?

The pain is not as bad when I am sleeping or lying down. It gets worse as the day goes on. recently I have had frequent loose stools and gas that has a terrible odor (similar to a fishy smell). The pain does not lesson after ping gas.I also have joint pain (especially in my elbows) and am extremely tired. I did have a rny gastric byp 5 years ago. I lack in vitamin D and B12 at times but take supplements. Recently, I had a UTI that my Dr. discovered. No symptoms with that, but treated with an antibiotic. I also just learned that I had an abnormal PAP and need to have a biopsy. Do you think any of these may be the cause of the pain?