Feral Heart

Usually I have the glitch where every terrain piece if African Grass. I was fine with that, but today I logged in and everything was the normal textures. I was happy until I moved my camera to the side and everything disappeared. I found that this glitch involves the angle the camera is at. The only way I can keep everything is to look straight up. This is a problem because I can't edit my characters that way! A more detailed explanation would be in some camera positions, depending on how close, where, and what angle Im viewing my character at, certain things disappear at certain positions. Some positions will make the water, chat, icons, and even some of my character disappear (such as the head, which is what seems to be more frequent than any other body part. Just either one side of the head or the whole head though. The eyes and teeth and such are still visible). Other people's characters aren't effected. I've tried taking screenshots but the ones loaded in my files show up perfectly fine, as if nothing disappeared. I've experimented and found I can still collide and interact with some things that disappeared if I hit the right spot (i.e. water still gives me the running effect even if I don't see it). I have tried reinstalling, but the glitch continues to haunt me. My computer (which is a laptop) is new, bought last Christmas and has been barely used. Could this be a problem with my computer, or the game itself? Is there a way I can fix it?