I am not a shooting coach, professional trainer, or marksmanship instructor (anymore), but if you just want some advice here it is. Go again and shoot. If you are still shooting high and left then you can consider drifting the sights to compensate for the leftness. Depending on how high, it may not even be much of a problem. If it is, then you can either get different sights (which i reccomend for stock glocks anyways) or alter your sight picture. IF you currently obscure your target withthe front sight, switch to a dot-the-I sight picture, and this should fix it. The even better options, though, are go get some professional training and coaching. That is what these guys are there for and no internet bolg, not even this one, can makeup for honest to God professional training. Good Luck!