Blood and Regurgitation

My husband has been regurgitating during SOME meals for a few years. Usually these are meals that are heavy like pasta and beef. It will go on for almost half an hour sometimes with him pacing the room and hitting his chest. Afterwards he seems fine.
Today was different. He had a few bites then threw them up but this time his nose bled slightly. He didn't care; he just wiped it off and it stopped. Then he ate more.
He is, of course, overweight and sedentary. He also drinks about five cans of soda a day. (type 2 diabetic)
What could have caused the few drops of blood? thank you.