Where’d my milk go?! 😔

I had a surgery two weeks ago (non breast related) I had to pump n dump for 24hrs afterwards and shortly after my son started refusing to feed on my right breast now he is a couple days shy of four months old and EBF now my milk is drying up. The supply plummeted greatly and I’m so sad and scared. He barely latches on bottle with breast milk we bought 7 different types and finally found one that he takes two oz of breast milk from. He refuses any type of formula we tried various types even and nothing. What can I do if I don’t make milk anymore and he won’t take formula?!?!! I feel like a failure I’m so sad I just want to feed my baby I was all about breastfeeding and his older brother was EBF til 1 1/2 no problems but right now IDC if it’s formula or breast I just want him fed.

I know no one can magically fix it just wondered if anyone else has been down this road any advice. Mostly just getting it all off my chest I guess.