Yep, sounds very much like gas to me. I get the flutters all the time where you can just feel the gas moving around. I kind of think it feels like when I was pregnant and I would get those little movements from my son. It was probably gas then too :) I'm glad your echo turned out okay. Palps can occur with IBS and they can occur with anxiety too both of which I have so I know the feeling.
Co-Moderator ~ IBS Forum
Dx: IBS 1989, Diverticulosis 2004, UC 2005, Sjogren's 2006
Meds: Sulfazine EC 1000mg, Mesalamine Enemas, Chlorzoxazone 500mg, Naprosyn 500mg, Symax SL .125mg, Protonix 40mg, Xanax XR 2mg, Miralax 17g, Supplements