Eating enough? 15 w pregnant

Hey everyone! I’m 15 weeks and 5 days pregnant today, and I’ve been worried that I’m not eating enough. I’ve had morning sickness since the beginning and it’s definitely gotten better but my food aversions are still giving me a hard time. It usually with any food that isn’t sweet.. it triggers the nausea and sometimes vomiting. As discouraging as it is, I try to eat actual food other than sweets, crackers, and fruits. I’ve slowly become more successful but I’m still not happy with my portions. I feel like I need to gain weight to keep my baby healthy. Before pregnancy I’ve always been 115-125 lbs tops… And it’s always been hard for me to gain weight. So when my husband and I started trying I started trying to eat more to gain more weight and I did. So far Since I’ve been pregnant I’ve been a steady 130. I told my OB my concerns and he told me he wasn’t worried and as long as I’m eating something… and also prescribed me medication for the nausea. Anyways had anyone else had a similar experience? If so what did you do? How were your pregnancies/babies?