Feeling underweight 🙁

So I'm 26 weeks and 2 days today, and I just had an appointment last week. My pre-pregnancy weight was 212 so I wasn't exactly small to begin with. The entire pregnancy I have been losing weight, it's gone to 205, then 198, then 209, then back down to 199 before. As of this morning, I'm back to 208. I'm getting noticeably bigger in the stomach area, but am still losing weight every where else. I eat plenty a day, more than I should probably. I still have some sickness but very rarely. The doctor doesn't really acknowledge it at appts. and I think it's because the nurses always do my weight, so maybe she just doesn't look. I'm just worried about my little girl. Anyone else in the same boat? 😕