Is it time?

I can't sleep I feel minor contractions coming here and there. my son couldn't go to sleep lol it took me about 1 1/2 to get him to knock out, I was tired and falling asleep myself but I could feel light contractions.Now I'm starting to feel pain in my lower back and lower abdomen. I hope I am and they're not just Braxton hicks, earlier today I wiped and saw some reddish goop on my toilet paper wondering if maybe it was some of the mucus plug?? I'm 39 weeks pregnant on Friday and I'm just over the pregnancy, 3rd and last!! So we'll see🤰🤰💤