http://whatifsports.com/hd/GameResults/BoxScore.aspx?gid=12006498

I've looked through the play-by-play and I can't see anything I would do differently. But I shot 13/19 in the first half and 6/28 in the second half, and lost by three. Neither team changed gameplans at the half. I actually had fewer TOs in the second half. It just looks like I couldn't make a shot.

Is this bad coaching on my part or just plan bad luck?

Those missed 3's could be what did you in. Most of the time (there are exceptions) I prefer to reduce the frequency of 3-pt attempts towards the end of a game. But what do I know, I'm just a n00b.