So many aches and pains to deal with during pg and when you have to stand up for long periods of time it can make it all so much more painful.

Could be SPD where your pelvis shifts around, it is very common and there are varying degrees of severity you can get a pelvic belt which will help. Also it could be bubbas head pressing on a nerve or it could just be your ligaments stretching and everything opening up ready for birth.

Good luck