Lost 7 pounds in less than a month

I’m having a rough time with morning (more like all day) sickness and I’ve lost 7 pounds in a little less than a month. I was overweight to begin with so it’s probably fine but I’d like to feel like a human again. I’m trying to force myself to eat for my baby but it’s a struggle. Has anyone found anything over the counter that works for nausea? I’m 10 weeks and won’t see my OB again for another 3 weeks.