Replying to Full Tilt Shin Bang

Last spring I bought some 2014 B&E's that were on sale for pretty cheap. At the time the tech said not to get them heat fitted yet because my feet would probably grown between then and winter (still haven't gotten them fitted, nearest fitting place is 6 hours away). So far this winter I have gotten some awful shin bang in them anytime that I have hit large jumps. Does heat fitting make a difference in having shin bang? Has anyone else had this problem?