Anak, please go to your OB or nearest hospital right away, severe headache sa pregnancy, lalo na kung pakiramdam mo talaga na mabibiyak, kailangan i-check agad ng doctor, okay? Hindi yan dapat i-ignore. A few of us moms sa group namin nag-experience ng bad headaches during second trimester, pero kailangan talaga ng professional check-up para sure na lahat okay sa baby at sa iyo. Rest muna habang naghihintay para sa appointment, and drink plenty of water, pero huwag mag-self-medicate muna. Praying for you, mommy.