Normal or worrisome?

Today I was laying in bed waiting for my fiance to come home and when I got up my lower belly and hips started to hurt really bad and I could barely walk. As I was sitting my hip started to hurt really bad. When I stand my lower belly hurts. I'm 30 weeks. Is this normal? Or should I go to the ER? I can feel my baby moving around but the pain is worrisome. I was lifting books and boxes earlier and do have slight lower back pain.