I kind of liked the exchange. Not sure, you really had to do it. Too bad you did not have time at the end.
Even if you had time, the black may still have some slight winning edge, since your Q and K are kind of stuck in the corner of the table (at least for a few moves). This should allow the black to get his pawns and K advance a little bit more.
I had an edge out of the opening against the tournament leader, fought a fierce middlegame to reach a draw, then blundered under time pressure.
I'm curious where you feel I could have played better moves. Obviously I need to manage my time better. Do you think my sacrifice was sound... and if not, what better way was there to free my bishop and secure my kingside?