I can relate to that feeling. It's so funny how it happens so fast!
Last time I wanted my hair trimmed, I did get an appointment pretty fast, but then I somehow got into my head that I needed to do something about my color - that it was too dark or something and didn't fit to my face. :
Thankfully, I didn't have the money to get it done at the place where I got the haircut, so I had to wait and after a day or two I was happy with my color again.