I sacrificed my rook to team up my knight with my queen. It allowed me to get check mate 3 moves later, but computer on here at that move said it was a blunder lol.
Your spelling is the blunder
How about a link to the game? Some of us "might" have a suspicion that your opponent played less than optimally.
http://www.chess.com/echess/game?id=117775886
21 Qg3?
Qg3 instead of g3 and you have nothing.
I sacrificed my rook to team up my knight with my queen. It allowed me to get check mate 3 moves later, but computer on here at that move said it was a blunder lol.