Position w/ins ALMOST every time

Let there be no misunderstanding, I'm a horrible player struggling to get better. I have some weird self-killing motivation to get too agressive early in the game and  so I lose constantly. However, here's a game where black should have lost if not for a little pawn providing key positional advantage. Pawns should be treasured. If you see where I went wrong before my move ...Qd6 please help me see the light because I think that at that point I should have lost.  Thanks.