Too Many Blunders..

Just now I played two games against a player who is 2250+...This is the first time I meet so strong player and I lost both games by making terrible blunders...Before the stupid mistakes, I felt the position quite equal. Although we played very fast, the blunder should be avoided... Here I played Qb2?? in order to trade queens and missed Qf3+....Now I think white should play Qf2 first..