question: hello,I hit my head in December during the skiing. i had a head concession. Now, after 5 months of that i feel my neck is stiffed or some sounds in the neck when i move it, especially when it is cold. It can be connected to the concession that i had 5-6 moths ago? should i have a check up again? Especially what kind of check up and where, and what do you advice me to do? THANK YOU in advance.