Swollen Back Postpartum

Hi, I am over 4 weeks postpartum. I had two epidurals and a vaginal delivery. I have noticed my lower back above my tailbone is puffy and a little tender… I have been sitting a lot the past two days due to my daughter being sick and she wants to be held all the time right now, and I’m still recovering from a second degree tear. My tailbone is also super super sore and pulsating from sitting on it and my butt keeps going numb. Could this swelling be normal?? It was swollen right after birth for a week or so then it went away and now it’s back again.

I go in for a checkup early next week and I plan on asking my OB about this.