Ay mamsh, totally normal yan! A few of us went through the same thing, one of my mum friends was 1cm for almost a month bago mag-active labor, tapos suddenly everything happened fast within 24 hours, so walang way to predict talaga. Thursday pa lang yan, you're still right on time, at 40 weeks exactly is still considered full-term, kaya huwag mag-alala masyado. That said, since you're feeling anxious, mas better kung makipag-usap ka na sa OB mo on Thursday para ma-check niya kung ano na talaga ang status and peace of mind mo, lalo na if may specific concerns ka, sometimes they can do a membrane sweep or discuss options if kailangan. Rooting for you!