Nak, that's exciting na ganyan na ang progress mo! But honestly, ang best person to answer na yan is your OB mismo, kaya follow lang talaga what she said, lagi nang safe.
A few of us moms here, some felt tolerable pain pa throughout, pero yung iba naman suddenly ramdam na agad, so really varies talaga. What matters is you're being monitored closely na, at you know to go to ER kung may changes. If your doc said mag-admit ka at 4-5cm, then go na, better safe kasi mas controlled ang monitoring nila doon, especially kapag malapit na talaga. Trust your instincts and your doctor's plan, ha? You've got this!