AITA For Not Telling my girlfriend that my hairstylist is an ex-girlfriend?

I (23m) used to date my hairstylist “Rachel” (25f) almost a year ago. The breakup was amicable, and we still talk. She didnt even start doing hair until afyer we were already dating, and she does good work, is professional, etc. It’s hard to find braiders aren’t overpriced, do good work, and are actually professional. Rachel’s awesome.

I think one of Our mutual friends let it slip when them and my girlfriend hung out together on Sunday, because afterwards my girlfriend came to my house and was very pissed off at me. She used very vulgar language, saying I should’ve told her about my regularly seeing (about once a month) “a girl I used to f.” Honestly, she was getting quite loud with me and I live with my parents, and I had To ask her 1,000 times to stop being a bitch about soemthing that doesn’t concern her. She wants me to change hairstylists just to make her happy.

After this argument was over (me asking her to stop) she left and slammed my door extremely hard. Luckily my parents didn’t hear anything since I stay in the basement. She blocked me, but unblocked me yesterday I think.

AITA?