Oo normal yan, mama, lalo na ngayong first trimester ka pa lang, hormones mo ay sobrang ingay ngayon kaya headaches ay common talaga sa pregnancy. Pero if it's severe, frequent, or may iba pang symptoms like vision changes o swelling, definitely check with your OB para peace of mind mo at para ma-rule out anything serious. One of my mum friends had migraines the whole first tri, then bumaba na pagpasok sa second, so fingers crossed ganyan din sa iyo!