Not feeling too good

I'm going through a rough patch and for the past week or two i haven't felt good about my body (feel normal and thin) once and i'm starting to get worried ! - I was ill for a couple of days , but not badly ill like sick ! But i felt pains in my stomach and i've felt massive and full all the time for the past week and not once - not even in the morning - has it gone down !? :S