Thanks for your help. I will be going to see a doctor asap i hope its nothing to serious.
That is a long time to have a swollen side. I'm guessing it would have to do with the muscles over your ribs that are causing you the pain and swelling. Anything else doesn't really make sense, other than maybe some type of malformation that has now become visible. Make sure to be seen by your doctor when you can. They should do an xray, blood work, and I'd also ask for a bone scan as well. Good luck.