the pills are called d-worms n i got them from petco. n imgoing to get the shots at petco

I gave my dog over the counter worm pills and a week later took him to the vet forgetting about what i had gave him. The vet gave him all his shots even for worms. and now he is sick. Hasn’t eaten in two days. Started out throwing up. He won’t eat or drink. Could this be what is making him sick?
He has stopped vomiting, but he still won’t eat or drink. He just lays around. He is only 4 months old. I gave him wa-l-mart over the counter worm pills and then the vet gave him a lot of shots. The treated him for worms again.

are dog worms dangerous?
my friend say they get in your skin and become itchy.
si if my dog has the and they are dangerous how much will the shot take?
and will we keep having to go to get more worm shots?

PLEASE HELP!!
i meant if i get in contact with them.
and can it become a disease to me or will i get sick?
my friend said that is i dont get my dog shots then ill get them if i pet her too much. and she said it gets inside our body and we start to itch.
IS THIS TRUE?

I got a 12 week old puppy from the human society yesterday and they gave him a parvo shot along with his other normal puppy shots (?) and a heart worm shot. We got him home and the first hour or so he was very playful and energetic but after that he slept the rest of the day. He only ate and drank very little. During the night he threw up 2-3 times and has no other symptoms. This morning we to him to the Vet and they did a feces parvo test. It came back positive. We took him back to the humane society but they told us the parvo shot can cause the (false) positive test results. I called another animal clinic, for a second opinion, and they agreed with the humane society in that it could be just the shots effecting him and that a false positive on the parvo test is likely.
I have searched the internet and I can’t find any information on the false positive after the shots. If anybody has any information please let me know. For now we are keeping him for a couple of days to see how he feels or acts. I really want to save this dog but don’t have the money for parvo treatment.
Thanks for your help.