I Have Pain On The Right Side Of Stomach, Generally

I have pain on the right side of stomach, generally in the middle which sometimes shifts up and down on right side. I was physically examined by a Doctor and told that i have swelling of the COLON.
I took O2 twice a day for 7 days
Taking LIBRAX twice a day
Taking PROVIDAC Cap twice a day
Pain has reduced but keeps recurring. Please suggest.
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