I had a mild headache last night, in the back lower part of my head last night. Today, I've had the same mild headache off and on, only now I feel lightheaded/dizzy as well. Is this normal? The headache isn't bad, nothing compared to the migranes I used to get. I just don't know if it could be a bad sign and if I should call my doctor... (who is now closed so I'd have to bother an on-call person)? I should mention my blood pressure has been perfectly normal throughout the pregnancy, I don't have gestational diabetes, and my iron has been fine whenever it was checked a few months back. I also take my prenatal vitamin still daily, and have been drinking lots of water.