Okay first I'd like to say that I KNOW none of you can diagnose this , especially as it happened a while ago but I've always wondered.
Over Christmas a few years ago I was so so unwell, the head pain I had was excruciating...I couldn't move because if I moved my head it was agonising. It lasted around a week. I couldn't even sit in a light room as I was so sensitive, my neck was stiff and although I was never sick I was very nausea
I went to a doctor a few times but as it was over Christmas it wasn't any checks and nothing was really done. I wasn't took seriously.