Last night i over ate some food and my stomache was in alot of pain, feels like bad cramps and i started sweating. Very painfull.

As time past it eventually went away.

Now this am: i had my protein shake and my stomache is in alot of pain again. almost where i cant stand it.

Has this ever happened to anyone?

Yes. When I was just out of surgery I didn't know how much food exactly I could eat, so I would eat that last bite and feel like I was going to die. I bought Gas X strips and would take several and a few hours later I felt better. I never had issues the following day. So I wonder if you still have gas that is still trapped. You may want to buy Gas X strips and see how you do.

It happened to me with my band just randomly. My surgeon's recommendation is to stick with full liquids for a day to allow the swelling to subsides, and allow your stomach to relax after overeating. I agree gas could be the culprit as well so be kind to your sleeve today, and fill it with liquids today. Warm liquids always made me feel better.