70% effaced and 2cm dilated @ 36 weeks

So my doctor did a cervix check on me last week and was surprised how my progress was. My baby boy is extremely down in my pelvic area. I'm kind on scared because for the past two days I've been having some cramping. I know it isn't contractions because they are not persistent. But my pelvic is so sore and pops a ton! Any of you lady's ever experienced this? Is it almost labor time or is he just being a butt head to his mommy? I don't want to go into labor until at least 38 weeks. I have two more weeks to go!