Should I go in or not?

Okay so my lower back is hurting bad when I walk, stand and lay down and my lower tummy is feeling tight sometimes I get contractions. And it feels like something is going to come out down there like mucus or something. Should I go in and get checked or just wait. Because I don’t want to go in and get sent home. At my last appointment they didn’t tell me how my cervix was. I’m 36+2 days pregnant (First time mom)