Hey So I Have A Concern About My Tailbone. I

Hey so I have a concern about my tailbone. I was on the stairs and fell backwards and hit my rear end pretty hard and heard a faint cracking noise. Ever since then my tailbone has been hurting when I walk or bend down. How long will the pain last? Is there any serious injury? And if so what should I do. It's been about a day since I fell and I haven't noticed any bruising. Any help would be greatly appreciated.