I have a nose bleed 4 times this week and I also have a headache. What exactly could of cause this?

Possible sinusitis. Without a physical exam, and more details, it is hard to say, but one possibility is a sinus infection - it is a common cause of frontal headaches and headaches "behind the eyes" - often a pressure like pain. The infection also affects the nasal mucosa which makes it more susceptible to nose bleeds. FYI if you are having nosebleeds, don't take aspirin, and try not to blow your nose hard!