Mucus plug ?

So basically the whole time I've been pregnant, ive had cream white discharge. Since ive turned 29 weeks, ive noticed that when i wiped, the toilet paper looked kinda pink but never really thought anything of it because I am colored blind and thought I was mistaking it for it being pink. I just turned 30 weeks and last night while I was cleaning myself, I noticed their was gooey clear discharge for the first time since ive been pregnant. Should I be worried? Or wait till contractions hurt to call my doctor ?