A winning poker player consistently puts their $ in the pot when they have the best hand. You won't always win every hand, but you will be profitable in the long run. Keep doing what you are doing and you will be fine. We all go through times like that and while it is frustrating to lose to a suckout, you must realize that it is those players that pay your bills. If you prematurely move to the higher levels, you will put your $ in the pot with the 2nd best hand and lose your stack AND everyone will fold when you have the best hand. That's much worse than where you are today.