I Broke My Tail Bone A Few Years Back, My

I broke my tail bone a few years back, my arm was wrapped around my dogs leash and i was dragged down a flight of wooden stairs, anyways that was about 3 years ago. I havent had any serious pain until tonight I was laying on my sectional and suddenly i felt a very sharp pain on my tail bone so I moved and it got worse until i went to my bed to lay down. Is it possible my tail bone didnt heal properly, I never saw a doctor I was about 17 at the time and My parents didnt believe it was broken and refused to take me. It was extremely difficult to sit down and very painful almost to the point of wanting to scream and always made me cry everytime I'd sit or stand. I have had some soreness every now and again but not as bad as tonight.