Its normal to have head ache while your pregnant?

Yes. First trimester culprit for headaches are usually hormones and blood surge while headaches during third trimester are commonly caused by poor posture and tension from carrying your little bub inside. Other causes may be lack of sleep, dehydration, low blood sugar, stress and caffeine withdrawal. Also be wary of other symptoms as headache may be an indication of preeclampsia, or high blood pressure during pregnancy.