After weaning weigh gain?

I am not sure where to ask this but has anyone experienced weigh gain after weaning? About a month ago I finished weaning my daughter (at 2years and 3 days). Since then I have gained 10lbs in 3 weeks. I was down to only bf before bed.

Is this normal? Is it a hormone thing? Will it straighten itself out? It’s making me very self conscious. I am trying to eat even healthier than normal and drinking a ton of water. Any advice? Thanks.