only you knows your body. the pain is more than likely ligaments rounding, & everything is stretching. plus everything is going to be moving up to give the baby room :) & it's normal to look pregnant, i was showing with my first child at 8 weeks. even though most of is being bloated. & if your hungry you should eat, the best thing to do is to eat 6 small meals a day, so it's more like snacking through out the day, just make sure what you eating is healthy for you & the baby...
which honestly i ate whatever i wanted. & gain 65lbs, & lost it all by the time my son was 1 month.. just stay active, that's the best thing for you.