If you don't have it all figured out right away it in no way means you're faking.

You were diagnosed with DID by more than one professional,I think they would know if you're faking.

Denial is a pretty common thing with DID. I went through plenty of denial myself,thinking I was faking . I apologized many times for faking during therapy sessions but my T would assure me I wasn't. I thought he was a quack tbh.