I have recently been having problems focusing/ and comprehending things in school. I feel really out of it and i get sudden bouts of lightneadedness. I am also getting weird shooting pains in the back of my head, along with slight headaches and a slight feeling of pressure on the top, rear portion of my skull. I also experience a bit of ear pain. All of the pain i have mentioned before is not intense. I think i may have suffered an inner ear/sinus injury while scuba diving. When i cam home from diving i was a bit dizzy, but the dizziness got worse the next day, and i felt nauseous and lightheaded. I also began to experience a slight pain in my heart. Those issues have since mostly alleviated themselves and i am left with my head problems and a slight pain in my chest once every few days. it has been around 2 weeks since my dive. Are my current problems because of an inner ear/sinus injury? PLEASE HELP!!!