I suggest you find a different chiropractor. Icing will not hurt your brain. I promote icing quite often. In fact, I was taught the importance of icing by 3 different chiropractors.

I wonder why you stay with that chiro if your neck is such a problem. Does he do "twist the head and pop the neck' adjustments ? They are often far too aggressive for the subtle neck injuries we suffer from.

There is a saying.

Only a (insert demeaning description of your choice) does the same thing over and over expecting a different outcome.

Sometimes, we need a prompt to stop and think about changing our direction. Just because a professional has M.D., Ph.D., D.O., or D.C. after their name does not mean they are the only solution to our problems.