Of course you don’t know who you are yet. You are 12! The teen years are an important period of time for self-discovery.
I don’t know who gave you all those diagnoses but unless it was a professional, please take care about how much credibility you give them. All teenagers have what can look like personality disorders. All teenagers have some level of anxiety about how others see them. All teens go through periods of what can look like depression.
If that weren’t enough, many teens these days aren’t getting enough sleep which makes everything seem much worse — and can create further anxiety and depression.
Please understand that saying all this is not intended to minimize your concerns. But I do want you to know that your “symptoms” seem normal to me. But I only have a short letter to go by. If my reassurance doesn’t reassure you, please do see a licensed therapist who can really get to know you and offer some advice.
I wish you well.