You moved your queen to a useless square.
Advice
For about 4-5 moves in the teens, your Queen was your only developed & active piece. You grabbed a pawn but White got a bunch of control over all sorts of territory.
Your Bishop was stuck on g7 behind a string of pawns. The Knight, as puny as it was, was more active where it counted, making White, in effect, a piece up in the area where activity was taking place.
Then you missed a nice tactical shot, which you'd see with more practice & repetition.
http://www.chess.com/livechess/game.html?id=97043077
Can someone go over this game?
Trying to figure out what went wrong...