AITA for eating my daughter’s food?

I (36f) have a daughter (15f), Fiona, and am currently pregnant. Fiona has struggled with an eating disorder for about 2 years now but my husband and I only learned about it a couple months ago and we have been trying to get her to recover and eat again.

We have started stocking up on foods Fiona will eat just to get her to eat anything. She really likes Oreo's (specifically the birthday ones) so we had a couple packages stocked in the pantry. Unfortunately while she was at school I began craving Oreo's really bad because of the baby. I thought I would just open one pack and have a couple, but unfortunately it lead to me eating both packages because the craving was too strong.

Fiona came home and saw that I had eaten them and went ballistic on me. She called me awful for eating her Oreo's and said that she had nothing to eat now (the Oreo's were the only thing left that she liked eating) and locked herself in her room, I presume to exercise because she does that under stress. My husband came home and chewed me out when he found out. He said that I'm f'ing up both kids because I ate all Fiona's Oreo's and I shouldn't be eating two full packages of Oreo's while pregnant because he thinks it'll harm the baby. My husband just doesn't understand pregnancy cravings though. It's also my house so I fee like food should be fair game. He ended up taking her to get her favorite food for dinner and more Oreo's while I sat at home and I just had leftovers. I feel bad because now Fiona is angry and husband's p'ssed at me. AITA??