Traumatic injury to mouth needed a dental crown I’m having problems with it?

I got in a traumatic accident where all of my front teeth became loose. Luckily all of them tightened up besides one. I saw a dentist immediately after and a couple weeks later I needed a root canal and crown on #8. The root canal procedure seemed to go well (no more pain). When my dentist tried putting the temporary crown on I was having so much pain I was in tears as he was trying to push the temporary up on my tooth. When the temporary crown was on without someone moving it I was had no pain. A week later I got the permanent crown put on and it felt great. It still does beside the fact that the gum line around that tooth is still grey and it feels weird as if it’s loose when I bite down. I have an open bite so I can’t tell if the bite is too high or not but I haven’t been able to bite down into anything since the accident. The accident happened February 4th, 2019 and I got my crown put on late March of this year. I would like to know what a dentist can do to fix this situation of mine? I don’t have any insurance until September so the cost can be expensive to go to visit in general.