I am 3 days post op. I've been having a bit of trouble trying to drink again. I was a gulper - which DOES NOT work with the sleeve. Found this out very quickly. Every once in a while I get this pain that kind swells, expands in my chest or a sharp pain after drinking - it doesn't happen all the time & usually after I take a big drink. So I am attributing to spasms that I have seen on the boards here. But my question is this - has anyone ever felt the "fizzies"? Weird I know but after I drink sometimes I feel like I have been carbonated. lol. Learning how to drink again is proving tough for me. Any tips other than the "sip, sip, sip"?