took of a foot out flew up, back flipped and fell on my head

Not a great range of motion in my neck.
I've been seeing the athletic trainer for the past three days and icing it.
Don't like taking pain relief cuz I overdo it if I do, and it hurts worse.
What else should I do? I don't sleep well at night b/c of this.
This probably ended my season...I could have lettered

Any drills I can do that don't involved getting inverted or swinging up?
Help is appreciated