I've Been Nauseated A Lot Lately.. Went Out To Eat

I've been nauseated a lot lately.. went out to eat today, actually was really choking on a piece of food.. after several tries of coughing it up it finally did.. Afterward, I was at fair and started hurting really bad (epigastric) felt like I had a BIG gas bubble up top. walking was painful to area.. didn't eat anything so it's not that.. now, 8 hours later I'm still hurting(worse).. have to lie flat in recliner for it to ease some.. I have to walk stooped forward..I took pepto bismol when got home.. it's steadily getting worse.. my GB is gone..