Ive had a headache of sorts for a little over a week. It wasnt a constant throb at first, started as a sharp pain on the left side of the head. This pain would come and go randomly. As the days progressed, the sharp pain moved closer to the left eye . Sharp pains increased at night. If I had my head lowered for a period of time and lifted it, the pain would come and I would have to quickly lower my head and tilt it to the side to reduce the pain. I tried taking tylenol but it had little effect. Today the pain has moved pretty much just behind the left eye and right above the left eyebrow and on closer inspection I have noticed a lump forming over the left eyebrow. Eye is throbbing, watering and a dull throb has formed in the left side of the head and doesnt go away. Neck is becoming stiffer as the day progresses. Im 29, female. Is this something serious?