Can being pregnant cause headaches?

I'm 4 months pregnant tomorrow, and i have been having these terrible headaches in my forehead. Could this be a symptom from being pregnant? I've gotten this like, 3 times this week. Are there any home remedies for this, because for some reason the pain reliever i'm taking isn't helping, but the main question is, could this be a part of pregnancy? if it is, is this usual? It's all in my forehead and it's making my vision kind of blurry and it hurts. Ugh :(