I totally get how you feel. I have those same reservations as well. I'm currently debating with myself about who is going to do my next touch up. That stylist you dealt with was a jerk. She just lost a customer. The purpose was to earn trust through her treatment and servicing of her new client. She should of suggested a trim, showed you what needed to be cut, and asked what you felt comfortable with. She also should have stated she could trim a small amount, then with additional treatments, cut every 4-6 weeks. I'm sorry she treated you that way.