Baby today didn’t want to nurse. HELP!

Baby is 9 months old. 1st session she reluctantly nursed, for some reason fussy. 2nd and third session she needed a bottle bc refused to breastfeed. She is teething so wasn’t sure if it was that. I just pumped and only got 1.5 oz total! so worried supply is going down. Period is a wk away so didn’t think it could be affected by that. I didn’t eat or drink as much as I should. So busy! Was gonna power pump tonight but any advice to help supply or anyone go through this during teething when baby is cutting a tooth? Did your supply go down around 9 months?