I am a 39 yr old woman. I am about 145 lbs about 5 foot 7 and I have a nickel size knot on the right side of the back of my head. I have severe headaches, vomiting about once every day, fatigue, and blurred vision. The knot does not hurt, unless i apply pressure. Sleeping, brushing hair, or laying on it. The headaches are really bad almost daily and its difficult to get rid off. Please help me with some answers if possible. Thank you.