Suggest Treatment For Dizziness And Lightheadedness

hi...i bumped the top of my head on the door of the dryer as I was transferring from the washer.
it happened about 2 hours ago, but I am suddenly sooooooo dizzy and light headed it is hard to see straight. I ate a sandwhich and drank but it doesn't seem to go away. I am also very tired all of the sudden. do you think it has to do with the bump?