Thanks for checking in everyone! Just talked to the vet and he is doing a little worse again.

I can't take much more of this roller coaster! $2k has come and gone now, it's been a full week and we still don't know if he will pull through or not.
ETA- I did look into Care Credit and the interest rate is 26.99%!!! There is a 23 day grace period where there is no interest, which doesn't do me much good on a bill that is going up aprox $200 a day right now. I'm hoping to workout a payment plan with the vet, haven't talked about that yet though. For now I asked my parents if I could borrow the money and make payments on it, but that was about 4 days and $1000 ago so not sure what will happen.