I have always had an issue when it came to sex. My fingers or objects always feel fine going in (to the point of 3) but if my SO puts his finger(s) or junk inside then I experience a sharp pain. Every time though it disappears fast enough that I can enjoy myself. I originally thought I lubed enough but I don't think that is the case anymore as I tend to be quite the producer. Basically I am confused as to why this happens or how to best relay this to the doctor when I go to my appointment.