Eight weeks ago I hit my head on the wall of the swimming pool while doing the elementary backstroke; just as I pulled down into the glide, I pulled right into the wall. My neck has been slightly sore, but with certain movements I get a sharp pain. It hurts occasionally turning it either direction or upward. Looking down is fine. I intend to get an xray next week; I'm 58 years old, fit and athletic; I swim, do Zumba, run...but with this neck pain, I'm being cautious to not overdue it. My question: What sort of injury might have incurred?