Usually when I eat a whole box or two of donuts by myself, my stomach starts to get really upset.  Not that I feel like I'm going to throw up or anything, but there's whole levels of annoying verging on painful.  If it happens just before I go to sleep, I toss and turn for hours because I can't even lay on my side comfortably.

What can I do to alleviate this issue?  It's not even just donuts anymore, I'm starting to get the same problems when I go through a couple large bags of Doritos.  This is developing into a major concern.