My hip actually popped last night. It's probably your hips expanding and getting ready for baby's arrival.

I think it's just daily stress and work for me. I'm a preschool teacher and spend a lot of time sitting on the ground and getting back up!

@kgguy616, I ordered a maternity pillow. Waiting for it to arrive. What causes that? I'm trying to find out so I can fix it.

Yes! but it didn't start until last week when I was 20 weeks pregnant. I had to readjust my maternity pillow!