I get this anxiety sometimes, but I go to the same barber every time I cut my hair, which is once a month,because having even slightly longer hair makes me dysphoric. The barber knew I was a guy from the beginning, because now I pass all the time, even without T. Before that, I used to go to a hairdresser, who always cut my hair in a more feminine way, because she knew me as a girl. But one day I just showed her a haircut on a boy and told her I want this haircut exactly like it's on the boy and she did it. After that, I changed the place I go and found this barber. So, you all just need to tell them what haircut you want exactly and they will do it. You pay them money for it after all.