Pulsating feelings do sound like gas however I can't say that for sure. You may indeed have anxiety, it can cause horrible symptoms that make the anxiety worse and in turn makes the symptoms worse. I'm not saying that your symptoms are caused by anxiety for sure but they could be. You may want to post your symptoms in our anxiety forum and see if you get a response from others that feel the same way. I would still recommend seeing an ENT though, 8 years is a long time so you might just need an updated check up. Try the gas-x and see if that does anything or try beano before you eat to see if that relieves some of the pressure.
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Dx: IBS 1989, Diverticulosis 2004, UC 2005, Sjogren's 2006
Meds: Sulfazine EC, Mesalamine, Chlorzoxazone, Oxaprozin, Symax SL, Protonix, Xanax XR, Supplements