Eric,
You pretty much answered your own question,I lose sight,what am I doing wrong....
Lose sight, lose fight thats an old saying thought up by a much wiser man than I!
I'd ask you if you have your views adjusted properly,then I'd ask if you pull so hard you blackout,doing your immelman?
Sure you can listen to guys like Stealth and learn on your own,that might take a few years and you'd be ok.Or you could listen to the guys who've been around a few years and suggest you get some training and maybe with lots of practice you can be Ok in a few months.
Really it's up to you and thats the 1 thing Stealth got right,only you can put in the time and effort to become better,there's many ways to do it but the best way is to get some type of training,practice,apply then train somemore......and so on!