I have a concussion that I got on Saturday, I went to the hospital Sunday, and my college s hospital yesterday. They told me that if there was a loss of balance, I couldn t walk, or anything like that, It was very bad and I could have bleeding in the brain. But, this morning I woke up and the room was spinning very badly. And I had sat up slowly. I then laid on my side and the room was still spinning and I was really dizzy. What s this mean? Should I go get a cat scan?