Sounds like a question for the dentist. Your tooth may have seriosu injury or it could get back to normal. But one thing is for sure, if you leave it untreated, it could get worse and you may (don't want to scare you but...) lose your tooth.
So go the dentist and let them help. If you're scared to go, to tell you the truth I am terrified of the dentists and have panic attcaks whenever I have to go !

It sounds to me like you may have nerve ending damage, you need to go to the dentist and get an evaluation.

Wow, i'm so sorry you were attacked.
That's awful.
My husband (in his 40's now)
hit his tooth hard in bike accident when he was 20
and the same thing happened.
He didn't go the dentist.
His tooth was loose for about a month and then became solid again - but it's still gray.
Years later when he went to have a different tooth filled he asked the dentist about the color of his front tooth and he told him the tooth had died and would always be that color.

Please take good care of yourself!
Xo
gg