Not sure what's going on.

Okay ladies I'm 35 wks today and have been having cramping the past week. Then today I believe I lost some of my plug and have been having horrible sharp pains in my privates and back. Baby is moving like crazy as well once the pains began. My ob just keeps telling me to stay off my feet but I'm nervous cause I didn't have this with my 1st. Just nervous and scared.