Advice please 😣

Ok so I pay my mom $250 dollars a month. I work two jobs and go to college at 18. I work my ass off. I usually take 100 out of one paycheck and 160 out of the other so my mom has extra spending money. I paid my mom for the month of January already, but I guess it wasn't quick enough to her liking because now she's saying she's going to charge me a "late fee" but I was never late? I paid her before January was over and we don't have a set date it's due. I never buy anything for myself and I finally scheduled an appointment to get my hair done, and when she finds out she wants to charge me a late fee. For nothing. I'm so bummed I may just cancel my hair appointment because clearly paying shit on time still isn't the right thing to do 🙂 if anyone has any advice PLEASE comment.