Someone told me my system isn’t ‘real’ because it was -learned- at the age of 14 rather than -formed- 6-9.

They’re wrong. Your system may not be based in DID, which means its not medically recognized as a disorder, but that’s all that means. If you experience something, it’s real. If your headmates exist, your system is real.

Try to remember ‘I think, therefor I am’. If your headmates think independent thoughts from you, they’re real. No matter what.