Help?

This morning at about 5 am I was woken up to this mild pain in my lower back which moved to they lower abdomen it lasted for about a minute then slowly went away so I laid down. Then I had to go to the bathroom and I had diarrhea (tmi) now it’s 9 something and I just got the pain again and I’m really really sore in my pelvic area. I threw up last night like a lot so I don’t know if that has anything to do with it. I’m 37+4 days I haven’t lost my mucus plug yet or anything. Is this a sign of labor or something else? I’m taking a hot bath rn to soothe it.