Ay, ganyan talaga sometimes kapag nagsimula lang ng pills, ang body mo pa lang nag-aadjust kaya breakthrough bleeding agad, lalo na kung few days lang after ng last period mo. But the headaches gabi-gabi na nararanasan mo now, that's worth checking with your OB, kasi some pills don't agree sa iba and your doctor can either adjust the dose or suggest a different brand na mas okay sa'yo. A few of us moms had similar issues at nag-switch lang ng pills after talking to the clinic, kaya don't worry ka muna but definitely get that checked out para ma-rule out kung it's the pills talaga or something else! Samahan mo nalang ang breakthrough bleeding sa list of things to tell your doctor, para complete ang picture.