I stubbed my big toe and most of the nail peeled off, I put a bandaid to keep the nail on. Hurts a lot, what should I do? See a dr?

Let try to help. If the nail got separated or almost separated cut it off, try to see the doctor may you need x-ray you could have fracture in the toe. Keep it clean by soaking it with h2o2 and warm water.
See a doctor. You need to be examined to make sure there is no infection or even the possibility of a fracture from the stubbed toel.