I would go to your parents immediately and get your bunny to the vet. I’m so sorry you’re going through this, honey. This is a lot of responsibility for a girl your age.
Lots of bunnies go through unsuccessful litters and come out totally fine. Pebbles just needs the right care now, which means a qualified vet. Talk to your parents or relatives you’re close to and try to get them to help.
After that, the main thing is to keep Pebbles and any other animals you have from getting pregnant again. If spaying and neutering is out of the question, then we’ve got to figure out a way to keep the males separate from the females. Breeding pets at home is very dangerous and brings too many homeless animals into the world, while there are shelters and humane societies all over the country filled with animals who have no homes. That’s why the subject is banned on these forums.
Do you have any updates? How’s Pebbles doing now?