How practice sounds it my head

Hello! I have always been told to ignore how practice sounds in my head. I know the practice works because I can see/hear the results. However, when I am practicing Course lessons/warmups, I find that it sounds very thin to me, almost like a bee. I am a soprano. There is no pain, no discomfort or anything of the like. Just wanted to see what other's experiences are. Thoughts?
Comments
If you are insecure about it, you can always upload some audio here of yourself doing the exercises. You'll get different opinions and help if you need it.
As for my personal experience... I really did not like to hear myself on recordings. However, that improves in time if you stick to the program and keep to quality practice. I don't record myself a lot actually, just to 'check' sometimes. I should be doing it more actually.