What do I do to feel better about my parents decision

My sister got lice from school and we found out late it kinda spread at the house and I have it since I'm not going to school rn (health problem) my mom wants me to go bald tomorrow and I tried to tell her to just give me a boy cut but she set her mind into me going bald idk what to do I've been crying even if it will grown out I don't wanna go bald