Tailbone pain???

Whitney • Hi! First time mom to Desmond 💙! He was born at 35 weeks and 4 days on November 7th, 2015!
FTM- Is this normal? I'm 29+6 weeks, and this past week I've had a really achy and at times painful tailbone. I've never felt anything like it, and I have no idea what I did or if it's just a normal pregnancy symptom.