I think it's safe to say that we have all blown the whistle when we didn't want to. We gat caught up in the moment as well. The only recourse is to either make the call or bite the bullet, announce inadvertant whistle sell the fact that the play was legal and play on with possesion. Of course the coach of team A will go nuts, but you could calmly tell him you made the right call and will give his team the same effort. Better to get it right then penalize to save face