I just had an incident with my brand new razor. I was shaving, and I have hair just inside of my vaginal lips, so I tried to shave them... And felt a slight sting during. I thought nothing of it until I got out of the shower.
I have a cut from the clit connection to the labia minora (or looking up a detailed photo of a vagina, it's basically right on the Glands of the clitoris, but not actually on my clit and my clit appears to be unscathed). It's about half a centimeter or so I think, and it doesn't hurt right now, but I'm a little nervous and would like to know how long generally it will take to heal.
I won't be masturbating or having sex until it's healed because it looks terrifying.
The good news is that mucous membrane heals rather quickly. Just leave it alone and let Mother Nature take her course. Most women have done something similar while shaving our vulvas. Next time get a professional waxing.
It's worth the time and money if you want to be hairless. Or relax and return to your natural state of of having pubic hair. Many women are growing back their pubes to embrace "au natural!"