I can't really find any answers on google, so I'm asking you guys (i'm 31 weeks)

Has anybody had any pain/discomfort down there? It's at the way bottom of my lady parts, and where my inner thigh connects to my pelvic area. The nurse said it's probably just the ligaments and the weight of everything down there, but I can't seem to find too much about it. I know pregnancy causes all kinds of general aches, but this has been somewhat consistent for about 3 days now. It's not my cervix. But it's fine when I sit and then it hurts when I stand up and start walking. The more I walk and move, the better it feels. But those first few steps, holy ow!

Anyone know what I'm talking about? It's kind of a sharp feeling, not so much a muscle ache or crampy feeling. I'm having the worst time trying to describe it