upper G.I. ?

Is there anyone who had this test that appears to have gained weight on that day? I had my test today and was instructed to drink large amounts of fluids following it. It seems that I have gained almost 4 pounds during the course of the day. I have only had 1/2 a chicken salad, a protein shake and a small piece of shortbread with fresh strawberries. I am not constipated. Have been drinking lots but NOT 4lbs worth lol. Is this just a little bit normal? I have my weekly weigh-in tomorrow and am worried about it.

I had an upper G.i. but don't remember it making me gain weight. Sorry I couldn't help you.