Hey there!
I've been working on my singing lately, and I've noticed a little problem I have... I keep having to yawn everytime I sing

I was just wondering if I might be doing something wrong in my breathing technique, and that I don't have a mental block that makes me yawn as a way of saying: "Stop singing! For the love of all that is holy, stop the singing!"

Hahaha.!!!!

First,sorry for late response on this one.

It just means that you need to control your breath a bit better.Try with long notes,and in very slow tempo.
Take just one octave of some scale.This way,you would be able to think on your breath more,and you will sing at the same time.

Some Luciana's and mine lesson you should go trough.

http://www.guitarmasterclass.net/misc-less...inging-lesson1/

http://www.guitarmasterclass.net/misc-less...inging-lesson3/

http://www.guitarmasterclass.net/misc-less...-vowels-lesson/