Uy, ganyan din nangyari sa isang mum friend ko on her 2nd baby, 4cm dilated na pero walang contractions, tapos mahaba pa ang cervix pa! Di talaga predictable ang bawat pregnancy hehe, lalo na pag later babies na. Since you're already doing the primrose and monitoring, make sure you're checking in regularly with your OB kasi 39 weeks na talaga and want to make sure baby and you are doing okay, sometimes kailangan lang ng little push or monitoring kung kelan talaga mag-start ang labor, especially kung iba ang pattern from your previous pregnancies. Praying you go into labor soon, mama, I know the waiting game is super tough!