18wks no weight gain

So before I got pregnant hubby and I had completely changed our eating habits and had each dropped about 30lbs. This pregnancy my morning sickness was instant and intense until 16 weeks. I’ve only put in about 3lbs this whole time, including 2lbs I lost due to vomiting and nausea. I’m trying to eat now, but I am just NOT hungry at all. I know I can’t “starve” my baby but I’m worried that I’m not hungry, I was starving my entire first pregnancy. For refrence, ith my first I put on about 28lbs, but at this rate I don’t think I’ll even scrape 20.

Anyone else have an issue eating?