Teens: should i be mad? What if you were in my shoes?

Every single day for the last 2 months maybe- i have been listening to music on my headphones while working. 3 times before these 2 months: i have got my trust card(card that lets us listen to music, leave the room, and use the bathroom) taken all by one of the four teachers for music. It is allowed like i said. In the last two months: i have did nothing but work hard in class while listening to the "loud" music. It keeps me relaxed for i dont have to hear others loud conversations. The teacher didnt say anything about the others loud conversations or music but just mine... That teachers knows how smart i am and how good my work is. But the thing is: she dont do nothing but complain about my "loud" music (even though i can hear over the music, its loud). She refuses to give me the credit i deserve. She knows my hard work because i always get a 100 on the assignments. Today, i once again got my trust card taken for the 4th time this year. I am really pissed off at her. No one but her cares about my music when im working hard. Should i be pissed off like i am now? I already made it clear im not turning the music down. I will be damned if i can hear everyones loudness over my music. I even told her i wont turn the music down...