non stop weight loss with 7 mo old...anyone else having trouble remembering to eat?

Kit

I won't lie, I bounced back pretty immediately after having my son and it was great. but the weight kept coming off. for the first few months postpartum I had no appetite. but after that, I just cannot for the life of me remember to eat lunch. I try to pack in extra at breakfast and dinner and snack but every time I step on the scale each week I'm down another pound. I'm naturally small but 91.8 isn't healthy for me at 5'2. Especially since we want to start trying for #2. I'd thought my at home scale was way off but my annual checkup yesterday confirmed it wasn't and I was pretty horrified. I mean, my son literally hit his head on my hip bone and started crying the other day lol. is anyone else just melting away? apparently my mom had the exact same issue with me. suggestions are very welcome.