I get so scared that I have to wake him and make sure he is ok

I used rolled up blankets for my son, he also had that neck problem and we took him to our chiropractor.....

I used rolled up receiving blankets for my daughter.

we used a rolled up swaddling blankets on both sides of our sons head support and it helped out

I did and it's not working

Look for a better head support my sons car seat came with a really good one

OK

try rolling blankets up and put it by his head