Question about labor

I’m 36 weeks and woke up this am with horrible diarrhea(sorry TMI). I again, this afternoon had it(still horrible). I’ve started to notice a dull achy pain in my lower back/tailbone area. Some minor(like 2-3)cramps in my belly.

Does it sound like labor is nearing? I see my OB tomorrow and she will check me at appointment, but I’m curious to hear your thoughts 😄