How can I be less annoyed and snappy at my mom?!?

First and formost you need to rememebr that she is your mom so respect her. you dont always have to agree with her but respect her. I think only YOU know why you are so upset with her. Once you figure it out then you might want to talk to your mom. If you BOTH dont cmmunicate with eachother you will grow farther apart from eachother. That goes for ANY relationship. Communication is key. I wish you luck. Take Care.