So a while ago I thought about something so hard that I forgot it and everything leading up to it and I tried to remember so hard that I gave myself a tiny headache and to this day I still have not remembered what I was thinking about also another odd thing that has been happening is that sometimes when I stand up my vision becomes blurry and I start to lose my balance and then there is a feeling like any sleepiness is draining out of me it's like a liquid that feels like nothing is running down out of my head and then I feel a slight amount but still a noticeable amount of heat behind my eyes please tell me if you know why this happens or if this has happened to you