About every other month, I have been getting a gastic severe pain, in which can last from an hour to 10 hours. I had a gastic bypass about 8 yrs ago, I used to get the pain about once every 6-8 months but lately been getting them monthly. I severe pain to the mouth of my stomach, and I start to vomit foam. If I try to take some Tums or aspirin my stomach will vomit them back up and will continue to try to vomit automatically on it own. I normally take the pain until it passes by getting in a fetal positon and laying down until it is gone. Do think it is my gall bladder and should I follow up with my Dr? I used to just think it was something that my stomach didn't like, and I would go through this but lately I haven't eaten anything to cause a reaction and it comes on.