Strange pains

So I'm currently 32 weeks pregnant with my second baby (the first turned 1 in November) and for the last couple of days I've been having strange pains. My pelvis feels torn, there's lots of pressure, and at times I'm basically unable to walk. I also get crampy in my lower abdomen and low back and hips. I can feel my belly getting tight. I'm not sure if this is just par for the course with a second pregnancy, to feel more pain... or if it might be something else. I just don't want to call the midwife for no reason..

Any mamas out there have this happen?