When life is unfair it sucks to be you

I am in a bit of a situation. Well you see I am currently doing swimming and musical right now and it has come to a point where one activity is interfering with another. For a few months I have been able to do both without anything happening, but now musical is coming closer to its show and I am having more rehearsals. These rehearsals are happening almost everyday , and just happen to be the time when I have a swim meet :( *grrrrrrrrr*. My mom emailed the musical director telling him that I would not be able to attend 2 of the rehearsals. The director emailed back saying if that was the case then I could hand in my music and not be in the show. We emailed him back saying I would still be in the shows and that I will skip swimming meets. Why is the world so unfair? People now a days have less compassion, and like to make peoples lives a living hell. :/ blahhhhh I thought life was supposed to give me lemons for lemonade, but it instead i have unfairness..... Now what can I do with that?