Pelvic pressure miraculously gone at 37 weeks

Just was wondering if any of you guys have experienced this before:

I've been dealing with pelvic pain and pressure since 30 weeks, today at 37 weeks 1 day I Stood up and the pain is gone.

I'm talking I can walk without any pain, I haven't felt this good in 2 months.

I always just thought that it was going to just get worse the bigger and farther along I got but now I'm worried why the pain is gone...

anyone experience this or have any ideas why??