weird feeling in abdominal area

This last week or so I've been noticing that sometimes, after I eat, it feels like the food is just kind of hanging out like a rock in my pouch.  I'm still being very careful to chew well, and eat slowly.  I've noticed that this also coincides with food just not feeling right when it goes down, so I end up eating less than normal.  Now, here's the thing that bugs me.  On these occassions, I have a hard time standing up for a bit, cause I get all crampy feeling inside, and in my ab muscles.  Has anybody else experienced this?  Any ideas what may be causing this?  Can you develop a stricture or things like that at 7 months out?  I should be past that stage by now, shouldn't I?