Dear Sean

This problem needs the help of a teacher, and it would be a good idea for you to work with someone on your singing. I can offer you ideas but one of the things that someone said at the last conference but one that I went to, was that if there is a simple solution to a complex problem, it's probably wrong, and I think that's probably true.

You need another pair of ears to help you. There are lots of teachers registered here an on other websites.

Good luck and don't stop trying
Agnex