Pain on my right side what can it be?

Need more info: I can't answer without more specifics: where exactly is the pain? (belly, chest, head, foot?), what can you do to make it better? Or worse? Is it constant or come and go?

Need to see your PCP: I assume right side of the abdomen. It could be any thing starting from muscle pain to intestinal organ causing the pain.Depending on the part it could be from the liver, gall bladder, kidney and appendix. It could also stem from the ovaries if you happen to be a female. Your pcp would exam you and decide on appropriate tests and treatments best suited for it. Good luck.