Help!

So I'm in the Water Polo team and Mariachi. I've been stressing out because the schedules conflict big time. I'm needed in Water Polo because I'm a fairly okay goalie. The thing is that it conflicts with both my mariachi class & AP music theory class (6th per.) I haven't been going to mariachi practices because of it and my director is getting upset because he spent $2,500 on brand new instruments for my section and my AP music teacher is becoming upset because I will have to miss class on away games (game schedule below) I honestly don't know what to do. Should I try to do it all? Should I quit water polo? Should I quit mariachi? Please help! I'm sorry it's long