Several have posted about doctors that won't prescribe certain medicines to women of child-bearing ability, even if the woman never plans to have children. That has nothing to do with the current guidelines, but about poor doctor-patient relationships. Get a different doctor.

I have had real world experience with this. I've known since I was twenty that I don't want kids. The first doctor I asked about long-term pregnancy prevention was just sure I would change my mind and wouldn't even talk to me about my options.

My new doctor, even though I'm still under the "recommended" age, said "call my secretary and I'll fit you in the first day I have space". (I'm still not sure I want to do it - invasive surgery, previous history of bad reaction to general anesthesia, etc, but to know I have the option is incredibly important!)