Before my period starts, I always get nosebleeds out of nowhere. I also get very sparatic periods; usually every few months. The longest without my period has been eight months. I just got my period again for the first time in four months. I'm fourteen, and started my period when I was twelve, so I understand that it's normal to be irregular. I am NOT sexually active. However, the thing is, my mother had endometriosis. I've had a long history of sinus problems, and a, wondering now if maybe I could have sinus endometriosis?