Now that the allergy season is in full blast i have noticed that along with the same ole same ole IBS D, I have been getting a lot of nausea, I get a lot of drainage from my sinus and just wonder if that could be causing the nausea?? I have an appt. with the gi doc who will probably upper scope me in Sept. I have gerd and barretts, so I am long overdue for one. I just hate soooo much to get either of these scopes. A friend of mine get very ill after an upper scope, vomited all night got dehydrated and had to inthe hospital for days. Now I am very scared to get one!!!