Good going, Rhoda! I hope your breaststroke movement in the 50 fly escaped the eagle eye of the stroke judge.
As for the difficulty in counting lengths in a 200m race, I can confess that I've lost time by thinking the race was over after six lengths and loitering at the wall. It probably would have been a best time at the time, too.
I hope you do decide to pursue pool swimming and have lots of fun doing it.