MS I was thinking the same thing. Pregnancy was the first thing that popped into my head.
When I was "overdoing" thermos, I got very nauseous after eating. it got to the point where I didn't want to eat becasue I felt so bad. Any chance that is your problem too?
what makes me feel sick after eating has always been that i waited too long to eat...dont know if im explaining correctly, but if i wait til im starving, then eat...i pay the price