I am in the same boat (well I've been forcing myself to eat loads recently, but usually I am). I hate forcing myself to eat when I'm not hungry, but if I eat very much at once, my tummy gets bloated and I get cramps- it's a no-win situation I am seriously tempted to just give up on forcing myself to eat though as I've done nothing but make myself feel ill for about a week now, and I'm fed up!
I don't count calories, and I probably should because I am technically underweight (although I like being thin!) and lose weight pretty easily. If you're also veggie, then you might be having the same problem I do that it's hard to get enough calories without eating the bulky things that give us problems.
I don't know, maybe we can team up or something? I'm glad I'm not the only one out there. It feels really weird battling with not eating too much at one sitting and then ending up not able to eat enough and losing weight- it seems like something there shouldn't make sense?
-------------------- "This is truly the age of bacteria: as it was in the beginning, is now and ever shall be."