Last breastfeeding 🤱

Tonight I breastfed my 9 mo. Old girl for the last time. I’ve been an emotional wreck. She’s at the point where she’s weaning off of me, and my supply is dwindling. We have been supplementing with some formula for awhile now, & now she takes formula bottles down way better than breastmilk (in the bottle & from the breast). I can’t help but feel some serious mom guilt, but I also want to make sure she’s eating enough .. I guess I’m looking for some reassurance that I’m making the right decision. 😕