I was sleeved on Sep 5th. I've lost 20 lbs but I've noticed repeatedly that I have Sharp pain in my left breast. There are no incisions near there, and it is worse when I sleep on my left side. Could this still be gas in my system?

that's what it sounds like... you need to call your doc!

I had the same thing and thats what I had. Just move around alot and try not to eat foods that cause gas. I still have gas problems and I am almost a year out. I just take Gas X Ultra and it works like a charm.