Hello, my head hurts a lot, and i have no idea what could be the cause, i have pain around the front and sides of my head, my neck is stiff too. And i have a big problem reading, assimilating, paying attention to a conversation and also sleeping. This started after i went to the amusement park and got on some of the rides, it was immediate and since then i cant concentrate. It hurts a lot, i ve take paracetamol, but to no avail. I take a lot of water, still doesnt help, i feel irritated, like i would throw up and very unsettled. Its been days now. Please help me.