feeling sick after eating big meals

hi im 21 and have only just started recently with this problem.
i have been out twice in three weeks for a meal, which in the past has never bothered me and now i seem to be sick and feel poorly after i eat slightly baggier meals. i have started to eat smaller meals but have only been eating my cereal in the morning then my tea at night because if i eat more it makes me feel sick and get bad stomach ache an pains.
please could you give me some advice on what i could do to prevent this from happening.

Thanks

[Renee Radenberg]

You should not be sick after eating and even with just small amounts of food. Suggest going to your MD to be checked and treated.