Hair Cut

I'm going for my hair cut in the morning - I normally go twice a year for a dry cut to get rid of my rats' tails to use an expression my Aunt used to use. BUT I have decided to get it cut short, well by my standards. It's currently 14" long which I consider quite short. I had about 2" off in November and had already had it cut twice this year.
So I rang and made an appointment for tomorrow and now I'm slightly panicking whether I've done the right thing. I may need a stiff drink in the morning. Sod the sun over the yard-arm stuff.