35w3d pregnant early labor?

SC
I'm 35w3d and been having bad back pains and consent bathroom runs (#2) 😳 to the point where I have to run cause I can't hold it. My BH contractions are a little more stronger but not unbareable. I haven't lost my mucus plug just a little discharge. Is this normal or signs of labor? Have any of you ladies experience this before giving birth? Thanks.