Tension headaches in pregnancy?

Im nearly 25 weeks pregnant and for nearly a month now I have been suffering with bad tension headaches.  I feel a lot of pressure in my head and it lasts all day, I don't get any relief from it and it can get so frustrating at times I want to rip my hair out! 
My midwife isn't concerned about them and my blood pressure and everything is fine. Also my baby moves all the time and kicks me a lot so that's a sign that baby is okay. It just me and these pressure headaches I keep getting. It's so bad most of the time I can barely do anything. I can't concentrate on anything either.
I also have been checked for protein in my urine but there is none so it isn't early signs of pre eclampsia. I was just wondering if any other pregnant ladies suffer the same thing? It's usually accompanied by a nose bleed but not all the time.. How did you get rid of it or relieve it?