Episodes Of Severe Headaches, Scalp Hurts Continually, Vision Loss, Leg Spasms. Medical Cure ?

I am a 58 years old female who has been having episodes of severe headache for over a year. The pain began as acute, slicing pain from the back of my head, behind my right ear upwards to the center part line of my hair. It was debilitating, but only lasted for perhaps 10 seconds. There was originally no residual headache. Now the slicing pain is still there - perhaps four or five times a day - but there is a continual pain from just below the right ear upwards. And my scalp hurts continually. I've noticed some vision loss, but nothing that can't be allocated to age and over use. I'm a writer so I spend a lot of time in front of the computer. As well, I've had two instances of lost time. Friends have attributed them to simply being absent minded, but at 58, I know the difference. Over the last year I've also had two or three episodes of bi-lateral spasm of my legs. No pain involved, but my legs spasm violently, kicking the ground and upwards to the desk for several seconds. I've never been an alarmist and have suffered severe migraine in the past, but this is different.