For the past two months I have been having a weird sensation on the right side of my head. It feels as if I have water in there. At times I experience sharp pains just on my right side, which is then followed by a twitch, blurry vision on my right eye only, and I can hear my voice as if I were in a tunnel or under water. Yesterday as I went for a walk I started getting the sharp pains, and even lost my balance. I currently have no medical insurance which is why I have ignored it. I know this is not normal. I use to suffer from migraine headaches, but this is nothing like it. What can this be and should I be very worried about it?