Bad sore feeling pain

Hey yall,i am 30 weeks pregnant,and i have been experiencing pain kind of where my stomach and legs connect?? Im not sure how to explain where it hurts, but it’s a horrible sore feeling that i’ve been feeling since 27 weeks i would say. I did say something to my OB about this,but she completely ignored me (like she always does). My sister said it sounds like round ligament pain,but it’s getting worse the further along i am. I can barely lift my legs past a certain point when im trying to put on pants. It completely goes away when i sit down,it’s only when i walk, try to lift my legs,or roll over in bed. Have any of you experienced this or should i be concerned? This is my first pregnancy,and everything is new and scary,so i’m not sure what’s good or bad😩