at the base of my vagina, just at the entrance I get a very small split, like a paper cut, it makes penetrative sex of any description [or even masturbation] uncomfortable. I don't understand why it happens or how to prevent it. I also have a tendency to get thrush after any sexual activity. Both these problems have meant that my sexual relationships have been few and far between, and I know I don't have any STI's as I was tested years ago and practise safe sex. Any suggestions? I am seriously considering remaining celibate at this rate.