EMERGENCY! Dog had a head concussion, will he be fine?

I'm taking care of my aunt's dog and about an hour ago, something happened. My sister basically had him on her lap while doing homework and he tried to jump off, but because he was between her and the table, he hit his head on the glass. He also hit the floor pretty hard. And I think he had a concussion or went into some sort of shock, something of that sort. It looked like he wasn't breathing and his muscles got really tense. His eyes also rolled back and he looked dead. I tried to give him CPR ( not sure if I did it right), and rubbed his body to try to keep circulation flowing. It took about 10 minutes for him to regain consciousness. I called a random vet and they told me to take him in today, but my parents really don't care about the dog and they're not letting me. And they just left for work, so I don't have availability to a car. I'd walk to the vet, but I won't make it on time because they close at 6. The dog seems fine now, but I'm aware that trauma may not be arise until later.

Would it be okay to wait until my aunt arrives tomorrow? And I only have $2000 in my savings account(I've been saving for something)...I'm not sure if that's enough to cover veterinary costs that may arise???

Please help, I've never had a dog and have no idea what to do or how much vets charge for this sort of thing. I'm freaking out right now, not just because it's my aunts dog..but because I truly do love this doggy, I've taken care of him since he was a puppy. What do I do????

Thanks so much.