low limit o8 post flop folds

In low limit PP games, 1-2 or 2-4 specifically; do you fold non nut high hands, and non nut high draws (with 12-13 outs), on a 2-3 high card board vs. one or two opponents? In other words, would you continue with the idiot end, or the 2nd nut flush etc? What about h/u on the turn/riv, do you fold to the paired board w/the nut flush h/u?

I find myself losing money playing the non nuts, even short handed post flop. (I don't have 2k hands yet, so I know it's not significant statistically, that's why I'm asking you all) But, when I make the folds, I see that I would've taken it down often enough to make me 2nd guess folding.

I don't have this trouble w/the non nut lows, they always find the muck, and the few times I'm wrong I don't 2nd guess myself.