Music

so i am in the music program at my school. my teacher is crazy and mean. my little sister had $355 stolen after one of the teachers classes and the teacher told my sis to her face "well that was stupid". like the teacher has never made a mistake, i cant believe the teacher said that.
we just recently had concert, our call time was 6 and we played at 7, we dont really do much in that hour. i asked if i could get to the school at 6:10 because i have a job and the teacher got mad and said that i had to there at 6 and that i should be putting school first. well i was going to show up late because i have to lock up an elementary building and i am the only one available because my co-worker has college and my boss is with his children, 3 of which are disabled. so i showed up late anyway and the teacher didnt say anything.
i am also in the musical. rehearsal is suppose to start at 2:30 and go til 7 but i have classes til 3:40. i asked the music teacher if i can leave at 6 so that i could make it to my job. she got upset and said that she was worried that i would always be late to rehearsal because i am 5-10 min late to her 6:15 AM rehearsals. she has let me leave early but i think she hates more because of it. there is a rehearsal coming up that i am going to miss, i was so worried to talk to her about it because it is the dress rehearsal and i needed to miss half of it, but when i talked to the teacher she just said to find out more info as to when i will be gone and see if i can come but when i am done. but yesterday i just realized that there is one more reahearsal that i need to miss part of because my school is doing college application stuff and is paying for one of our application fees. i havent talked to my teacher yet and i am worried about talking to her.