I had my appendix out 12 years ago so that is not the issue, but out of nowhere last night I had a sharp pain in my right side, close to where I think are my kidneys, I was awake all night, the pain did not get any worse or better then I took an Aleve this morning, got a little dizzy, took an hour nap and woke up with no pain at all, but since I have been walking around today it is starting to hurt again, what could it be