Sounds like it could be early appendicitis!
Check out this website -
http://www.webmd.com/a-to-z-guides/a...citis-symptoms
Here is a quote from the site:
"Many people feel the first pain near the belly button. Then it moves to the lower right side of the belly."
Isn't that what you described??? Go see a doctor! If you can't get in go to the ER. One of the things they do to test for appendicitis (besides bloodwork, etc.) is to press on your belly and then let go. If it hurts more when they let go quickly (quit pressing) then it could be appendicitis.