Sakit kepala memang biasa dalam pregnancy, especially hormonal changes kena effect sikit, tapi kalau hari-hari macam tu better check dengan doctor just to be safe, bisa jadi dehydration, blood pressure changes, atau stress kat first trimester ni. A few of my mum friends kena sama, but once they drink more water and rest properly, it got better; yang penting is make sure doctor tau pasal frequency nya, especially since ni first time you're pregnant.