For the last four days, I have been receiving the same symptoms no matter what. The symptoms are : nausea, and headache between the eyes and at the back of the head. It doesn't matter if I eat or dont eat, it still happens. I have been shaking, and sensitive to light and sounds. I sometimes have relief for an hour or so and then it comes back. I have been taking over the counter medicines and it just seems to not work. What is going on?