Help For Koda

Those of you who may or may not know, last year I became a Fur Parent(however you say that) to the most amazing dog I've ever been given in my life My German Shepherd Koda Buddy. Recently he's fallen extremely ill, I have been a wreck since but he's been diagnosed with Parvo Virus; he's been throwing up, having a bloody stoo when he uses the restroom and it's hard for him to eat, he still drinks some water here and there though. The doctors say it's a good sign he still tries to eat or drink and keep it down. We may have found this really early on considering he can still walk, and is very alert(after barking at all the doctors who've come in to see him) they too believe there's a chance he can come out of this alive. So we moved forward with treatment, unfortunately my care credit could only go so far with a 32.9% APR and I was only able to afford a week's worth of treatments with injectables and pills that could possibly kick this(i hope with just a weeks worth) there's no telling how much the cost could grow to if this one week of medicine doesn't help or if he gets worse, there's antibiotics, amoxycillin, maropitant, and famotidine. Again hopefully this will work i don't wanna lose my best friend, SO I HAVE TO TRY! Thank you for taking the time to read all this, if you can help in anyway it would greatly be appreciated. I can't lose my boy, not like this; he's the first dog I've had in a long time that I would honestly die for. So please my friends take this and share it. Every little bit means the world to me I just want my boy to be ok and happy and healthy.