Pregnant eating habits

Okay. I'm a bit confused here and at odds. I've been told since I have gotten pregnant that I am over weight. Not by much but I'm over weight. I walk. But I admit I do eat a lot. But I eat when I get that hunger feeling from the baby because if I don't, I start to puke n it hurts. I eat in small portions n have snacks. I'm 149 lbs at 14 weeks. Idk what to do...