Hi mama! Totally normal yan, hindi lahat ng first-time moms bubukas ng cervix bago mag-labor talaga, ang iba bumubukas lang talaga the day before or during labor na mismo, kaya don't worry. Ang tigas ng tiyan (Braxton Hicks) ay sign lang na nag-practice ang body mo, pero it doesn't always mean you're dilating yet. Best to mention it sa OB mo sa next checkup para ma-monitor niya properly, pero march ka pa lang technically so marami pa kayong time! Hoping smooth delivery for you mama, ikaw kaya!