Uy babes, first thing, please see a doctor or go to your nearest clinic ASAP para ma-confirm kung buntis ka talaga, kasi irregular period mo at may withdrawal activity ka, kailangan mo ng proper check-up at hindi lang guesswork, okay?
Yung birth control pills talaga, mas effective sila kung consistent ka from day 1 of your period, pero honestly, that's something a doctor can guide you on based sa situation mo, basta huwag ka mag-self-medicate na lang. A few of us mums went through irregular periods din kaya nakakacomprehend ko kung nahihiya ka or lost ka, pero ito na-talaga dapat sa expert, lalo na may possible pregnancy pa. Hugs, hope you get clarity soon!