Minor headache as a sign of pregnancy?

Bailey

I've been experiencing mild random headaches. Definatly not throbbing but definatly noticable. I'm on CD12 and we have BD almost every other day. I took a pregnancy test last weekend but it was negative. I'm trying to hold off doing another pregnancy test to avoid the sadness of yet another month of not conceiving. I guess I'm looking for opinions or people with who have experienced this.