Little bckgrd: I am a 65-yr old Black woman in basically good health----Height=5'5", weight=143lbs, avid exerciser(3-4x /wk). Daily Meds: mild BP (Hydroclorot 12.5mg), statin (Simvastin 20mg), 81mg aspirin as well as OTC: VitD, Fish oil, calcium (600mg) My Question: I awoke this morning to "periodic burping" (i.e., first hourly, then every couple of hours over 6-8 hr period). NO OTHER symptoms----no pain or discomfort, nausea, etc. Full disclosure: last food intake (sweet potato pie) w/last night aprox. 8:30pm. I don't normally eat this late. Also, I took 2 tablespoons of apple cider vinegar (to balance glycemiciaffect) before the pie. What could have caused the burping? Thank you.