Help?!

So for the past 2 weeks I have had a headache on and off. It seems as soon as it goes away it comes back or I wake up with it. I’ve been checking my blood pressure and it’s been 140’s/70’s (OBGYN knows about top number). My OBGYN told me just to take Tylenol but that isn’t helping. I’m literally going insane. At times it hurts so bad. Any suggestions on what I should do? I’m 16 weeks 3 days