Well step #1 is stop over betting your bankroll. Especially for a player who is so green, you should be playing for much lower stakes. Really you should be practicing at home for no money instead of playing 3 x 500 at the casino, or red chipping with a modest spread while you perfect the strategy. Once you are more a seasoned player then you can start betting bigger, but still you want 200-400 max bets in your bankroll if you are playing with a large five figure bank and are playing 2 or 3 hands at a time. Honestly I wouldn't be surprised if you were making basic strategy mistakes, given your haphazard approach to learning the game, to say nothing about implementing index plays correctly and having accurate deck estimation / true count conversion.