That's a lot of shots in one day for a little one
He might just be having a hard time with that. I say feed him some plain boiled chicken and rice, or if someone can go to the store for you, some baby rice cereal, baby beef and a little half and half. If he keeps that down, he should be just fine. If he continues to vomit, give him a wee bit of Nutrical and make sure he's drinking water. As long as he's eating, drinking, and pee/pooping, he should be okay. If he becomes lethargic at all I'd take him to the er vet. What's $100 compared to losing him?
So if you can get something into him and he keeps it down, that's good. Watch for any swelling of his face or head, that needs vet attention immediately!
Prayers going out for you and your little one right now
