What should i do about my mom?

My mom has been a ***** the last 2 years and im sick of it she is really bossy she go out every weekend. it is always about her and im sick of it. Anyway she and my grandmother are fighting because she thinks my grandmother has to much influence on me aand it is bull crap and i want to go on a trip to wisconsin for a family reunion with my grandmother and my mom wont let me go because she thinks 4 days is to long to be gone and she is mad at my grandmother what should i do?