So, I haven't been tipping my stylist. I feel like a jerk.?

I usually always tipped when going to a hair stylist. Every stylist I'd ever been to had the option of adding the tip to the bill when I ran my debut card (like in a restaurant). I moved, and found an amazing stylist that I've been going to for the past year. The salon where she works doesn't have the option of doing this (the tip line isn't there on the receipt). Since she works at a nice place, I thought that she was getting paid from the cost of service and that tipping wasn't appropriate.

Now, I think I might have made a big mistake. My mom never went to the stylist when I was growing up. I'm in my 20's, but I really don't know jack about salon etiquette. Should I change stylists? I'm so embarrassed about this. I probably would have given her over 100 dollars by now if I'd been tipping.