Tailbone pain after weight loss?

I know for many of us our butt's have gotten smaller which results in our bums getting sore from sitting too long. But is it normal for your tail bone to hurt all the time when sitting in the same position for too long? That happens to me no matter how I sit. Even when I'm on my couch.

5 years ago I fell and I'm pretty sure I bruised my tailbone. It took several months for me to get better and never had an issue since as I gained more weight. now that I'm 70 lbs lighter, it hurts all the time and I can't tell if it's that fall or if it's the weight loss. I'm considering going to the doctor.