I failed to convert this material advantage.

Hello Chess.com 

I've been trying to make a habit of playing more live matches, and after spending about an hour on Tactics Trainer, I began my first match.  I played Black and, much to my dismay, my opponent opened with the King's Gambit.  I say to my dismay because I am not so familiar with the King's Gambit as I am other openings, so I tend to expend a lot of time even at move four.

What followed was one of the greater games I have ever played, even if I did lose.  I spent much of the first half of the game trying to defend against my opponent's attack on f7.  I feel that I defended somewhat accurately, and when the dust settled, I had an imbalance I've never wielded before: excluding my extra rook, I had three minor pieces against the queen.

Despite being a major piece up, I lost the game.  I felt that I couldn't quite mobilize my pieces and coordinate them even against a long queen.  My opponent mopped up my queenside pawns and marched them to victory.  It also didn't help that I was in tremendous time pressure near the end (something like three minutes to twenty-plus at move thirty).  While the game is still somewhat fresh on my mind, I wanted to submit it to you in order to get feedback from more accomplished players.  I feel like there's a lot for me to learn in here:
 

It's always difficult against a queen even with a material advantage, I lost a similar type of position I should have won about 2 weeks ago, only it wasn't against the kngs gambit but the evans gambit.....

Story of my life... 

Tbh I didn't even notice the queen sac. It was a cool idea. Anyway these games depend a lot on tactics and piece coordination. White's only chance with the queen is to get at your king so if you can prevent that you'll be ok. 

White had only a queen and a pawn for the bishop pair, a knight and a rook so you were definitely winning. White just got a little too close to your king there. Maybe 16...Nxd5 17.ed Ne5 was a little safer. Your next developing moves may come with tempo anyway and you should still be able to overrun White's pieces.