I had bad acne issues as a teen. If I would give one simple advice to myself then I would say "just go to the doctor and get the tetracycline already. You don't have to live with it no matter if you are bullied or your parents give you alternative remedies. Just go to a doctor and it will get better!"
The worst part of acne was that it bought severe depression, and not necessarily the kind that is easy to recognize as a teen.