I was lying in my bed for about hour when I suddenly stood up to go the comfort room to pee. While I was peeing, I felt that my heart beat was terribly slow, like 1 beat/1.5 second or 1 beat/2 seconds which was painful and I felt really dizzy. It feels like something very hot just rushed to the top of my head and my sense of hearing was not normal at that tiime. I am worried. What could be the problem inside my body?