Sooo I'm almost 3 months out and I still have slight pain when eating or drinking. I also "burp up"(throw up a little) food and liquid while eating. Is this normal?

I had this grinding sensation whenever my sleeve didn't like a new food, which was most of the time. It was kinda like my stomach going into knots. But if you are in real pain, I would check with my doc. Throwing up a little might mean you are eating or drinking too fast. I was only able to eat about 1/4 cup of food each meal for about the 1st 6 months post-op. And I had to eat that little bit real slow.