Uy, mama, this is something you really need to discuss with your OB agad, hindi ito normal to stay at 3cm for that long, kaya please don't wait para sa next checkup. I know it's scary, pero kailangan niya makita kung ano talaga ang nangyayari at kung kailangan mo ng extra monitoring.
A few of my mum friends were in similar situations and their doctors gave them specific advice tailored sa kanila, your OB might want you to come in sooner, or adjust things based on your exact situation, kaya please reach out na. Sending you lots of prayers, mama! You've got this.