Headaches and Nosebleeds...?

Since last Monday, April 20th, I've been getting throbbing headaches on a day-to-day basis, starting around 9 am. It was generally take one or two Tylenol at 11:30 (when I have lunch) and rest my head until noon. That is, until this Monday.

During my first class, around 10 am, I experienced a mild nosebleed. I left the class, walked to the bathroom, and stopped the bleeding after three minutes. I thought nothing of it until last night, Wednesday, when I experienced yet another nosebleed. This hard more severity behind it and took nearly ten minutes to stop, leaving me with a horrid headache to deal with.

Could it be the barometric pressure in my area or something else? The temperature went from in the 80s with clear skies to the low 30s and snowing in a span of three days.