First of all welcome to the group.
I am a 24 year old with a birthmark on my face. I started laser treatment 19 years ago. I also use a pulse dye laser. I am so thankful you found a doctor that has a laser. Also I am glad that it is working well for you. The laser has only work on me a little bit because of the thickness of my birthmark. I have had plastic surgeries also.
I know exactly what you mean about the questions or stares. You should not have to had your birthmark from others. I guess after the years of gone by it does not bother me as much. Something that might help you boost your confidence is remind yourself that nobody is perfect and that if someone judges you that is their problem.
I hope your treatment goes well, and hope to talk to you later.