I was walking and accidentally stepping in a pile of wet mud which caused me to loose my footing and my heel slid out from under me to the side. Luckily I was able to catch myself, so I did not fall, but I had to brace myself to rebalance and prevent a fall from occurring. The unexpected jolt of my heel sliding out from under me and my reflexive response to re-stabilize myself caused me to feel some vibrating/jerking movements and shaking in the back of my head from.

This happened 3 days ago now and I have had a horrible headache at the back of my head that is radiating to the front and sides ever since. I find it hard and depressing to believe I am so fragile that this would trigger a concussion but I have been feeling horrible in the days since it happened and was not feeling any headaches beforehand so I cannot deny the timing.

Could this have caused a subtle neck injury or something like that?