Why Am I Getting Pain From Toenail Growing Back?

Hello. My big tonail was pulled up from the nail bed while playing football. Anyways the toenail fell of over a month ago. I'm letting the new one grow back in, but it's taking a while. It's about half way there. Just the other day it started to hurt. Not at the sides like a ingrown toenail, but at the top. It seems like its pushing the skin that raised up after the nail fell off back. Any thoughts? Thank you!