Yesterday, I got into my hot tub and sat down before thrusting the top over (divides into 3 parts) but instead of it opening, it came back down and hit me on my head , directly on top. I heard my entire neck crunch inside but it did not knock me out. I have pain on the left side of my neck/ shoulder , and have difficulty turning my head today (can do it but it hurts) or looking up or down. Looking at the anatomy of my neck, the pain isn t consistent with the sound of the location of the possible break/crunch. How long should I wait before seeing a doctor? What was cause the crunching sound?