39 weeks pregnant with constant headache?

I've had a headache for two days now and its gettin worse. I've taken tylenol but it didn't help at all, and I know that I shouldn't take more than 1000mg in 24 hrs. So I don't wanna take anymore. I went to my weekly appt yesterday and my blood pressure was slightly elevated. Not to high but higher than it has been. Is that why I have a headache? And every once and awhile it'll feel like theres something heavy on my chest, not painful just a lot of pressure.