Early signs of labor?

Zo

I'm 33 weeks today and since yesterday morning, I've been having severe rectal pain. It started out as normal butt pain that was bearable, but as the day went on, it started to progress to the point where now I can no longer walk or sit! It's EXTREMELY painful!!! I went to the hospital and they put me on a fetal monitor, the baby is doing fine, but the Dr. said that I only had 2 contractions.

Please not that I don't have hemorrhoids and my bowel movements are fine. The Dr. didn't tell me what's the cause of this unbearable pain!!! But they just sent me back home

I'm currently typing this while I'm in DEEP pain and I've been crying and I don't know what to do!!

What is happening? Is this normal?