I am 38 weeks 1 day. I have similar problem. I am in so much pain where i have take some tylenol. I nevet take meds during my except for my prenatal and Iron pill.
Try evening primrose oil! I've heard amazing things about it. it helps your cervix soften and prevents tearing to a certain degree also!
I'm 38 weeks 6 days been contracting for four weeks and stuck at 4 cm 50% effaced I have a three year old and a two year old and my significant other works from 1:30-12. My boys haven't been to daycare due to weather and holidays so I've been doing everything on my own and I'm in a ton of pain. It's killing me to even sit, castor oil did nothing to help me just made me violently sick to my stomach. Do your research before you try it. My dr appt tomorrow were supposed to set an induction date finally!!! Good luck