I'm not sure where you are, but there are clinics that you can go to with no questions asked.
When I got on BC at 14, I went to the local clinic two blocks from my school. The doctor was very helpful. If you are underage, look for those clinics. They typically have a program for underage people who are asking for sexual health problems. I wasn't active, but my doc listened. Planned parenthood or affiliate clinics are very good about it. Their main goal is to help young people. If you are still in k-12 or standardized school, ask your health teacher. I was in a program called RARE-T and I was an active counsellor at 14-15 telling others about sex safety and BC.
When I worked pharmacy years later, I found that a lot of docs where okay with prescribing depo for people with heavy or painful periods.
Captain Blood is a nightmare, but there are sources in most cities to help young people.