Mama, please check in with your OB right away, especially with the back and belly pain, para ma-monitor kung ano talaga ang nangyayari at kung kailangan na ng intervention. Hindi kami sure kung labor na yan or something else, kaya importante talaga makakonsulta ka. At 38+ weeks with cervical changes and pain, your doctor needs to assess you in person, that's the safest move para sa iyo at sa baby. Hang in there, mama!