Trouble with meat

I've been trying lots of things and haven't had too many problems. Even pizza dough is ok. I haven't tried real bread yet, but I would imagine it's all the same.  The only problems I seem to have is with meat.  It seems to take longer to get into my stomach so I have some discomfort for about a half hour after eating. Not quite pain, and I don't throw up from it. But it seems to happen even if I chew it to a pulp before swallowing.  I also have trouble eating a meal over half an hour. There is such little food that it goes within ten to fifteen minutes at the longest.  And even with that it's usually cold by the time I finish. 

Has anyone else had problems like this?  And when does it usually get better?