Oo naman, normal yan sa pregnancy lalo na sa first trimester dahil sa hormonal changes at blood pressure fluctuations! Pero since 10 weeks ka na, better check with your OB para ma-rule out kung hindi lang ito dehydration or something else na kailangan i-address, kasi gusto natin na healthy ka throughout your pregnancy. A few of my mum friends had frequent headaches during early pregnancy and they were fine naman, pero importante talaga i-monitor and report sa doctor mo, lalo na kung severe or hindi mawala even after rest and water.