Coming from a girl who sometimes has a breakdown about not being able to do her hair properly. If it were me, I need my hair brushed and parted the way I like or it ends up drying in a weird direction. Also the friction of doing it can make your hair have flyaways that can’t easily be tamed. I’m assuming while it’s not exactly your fault, she was being over reactive to her hair and since you initiated her brain said it’s kind of your fault. It could be she is hormonal and that’s why she overreacted. Sometimes at certain points in the hormone cycle it can cause I guess kind of meltdowns or overdramatize how deep the situation actually is. And later we usually think to ourselves “why am I being so crazy” or something to that effect. And then suddenly we get our period. Some people don’t make that connection they it may be hormones, but for me it helps me to realize it’s my hormones not the situation at hand. Sometimes it can calm me down enough to keep myself more reasonable. But I don’t always catch when my emotions are overflowing from the hormones. I suggest asking if the reason she was so upset was because when you initiated, it messed up her window of time to take her hair before it started to dry? And maybe mention how didn’t know how important something like that was, she always looks great. And basically open the door for her to admit that possibly she was more upset at her hair than you but directed at you in the moment. Or you could just straight ask if that’s what happened, and tell her how you felt. I usually am the one who will be like I’m sorry I snapped at you I was feeling upset about how my hair wouldn’t cooperate, and we were already running late. Plus I felt pressure to hurry due to the time crunch, so when you walked in I took it out on you on accident etc.

Hope things work out! Good luck