I am 20 weeks, I have not gained anything because I've been so sick.. I am also extremely depressed and I'm not sure if it's the consistent nausea or the depression but I cannot eat much of anything.. most days I can't eat anything. I eat a good meal maybe once a week. I read about a baby who developed wrong because the mother was anorexic but that's not my intention.. we were just at the 20 week app Monday. Wouldn't the doctor have noticed already if he was going to have a low birth weight? If I'm nauseous I have pills but they knock me out.