It randomly popped up one day, starting in the back of my head, but entirely on the left side. Within a day or two my neck was stiff. The doctor gave me a few muscle relaxers and nsaids that helped the neck, but every day I wake up with a one sided headache, and a tingly pain that wraps around to above my left eye (not constant). It usually subsides during the day and seems more prevalent when I relax at night and in the morning. I just can’t shake the thought that it’s something sinister. 
This week I did have one day it didn’t occur, but came back the next. No issues with light or noise, and unlike a headache I’ve ever had. I almost wish a new symptom would pop up so I’d know what it is