Welcome Empty Cartridge!
As everyone else has pretty much said, you NEED to see a doctor. I began having pains at the end, too. Nothing too severe, but I thought I might be developing an ulcer or pancreatitis. I got lucky. You need to get some medical attention. Remember, your career won't mean anything if you're in ICU for weeks. Please be careful.
Blessings and prayers to EC. Keep in touch,'K
BHJ