Early labor? Or 35 weeks tomorrow FTM

I woke up and my belly has been so sore I have pains on my sides. constant mid to lower back pain and diarrhea all day. I don’t know if this is just common pregnancy pains or early labor. When I peed this morninf I looked in the toilet and there was a small amount of green mucus which I’m assuming was a part of my mucus plug. Anybody know if this is normal should I get checked out? How do I know when I need to call the doctor. I’m so confused. My moms in another country so I can’t ask her opinion. I don’t want to be the girl who calls and it’s nothing