I am 66 years old & while traveling in our motorhome today, I fell backward, very hard, on my right buttock, landing on the edge of granite countertop on a center console. When I was finally able to get up off the floor, the pain was almost unbearable. I now have a very large, swollen knot on the right cheek which is hot to the touch & hard to sit. Every time I stand up I get light headed, chill, sick at my stomach, & feel as though I m going to pass out. Is this something I should be concerned about or will time take care of it?