Nak, if you're 3 weeks stuck at 2cm dilation, I'd really encourage you to check in with your OB or go to the hospital soon, hindi ito something na pwedeng i-monitor lang sa bahay. A few of my mum friends experienced slow labor, pero dapat talaga sila-check ng doctor to make sure baby at ikaw ay okay. Huwag maghintay pa, mas peace of mind mo kung alam mo na lahat is fine!