at first this did bother me too after I had been diagnosed DID. Then my treatment providers explained to me that nothing was going to change, everything that was before I was diagnosed has already been happening all my life. all that was going to happen after I was diagnosed was healing, getting better, learning how to handle my problems without the need to dissociate....

then they asked me a question... before now when I didnt know there were others did it bother me, no it didnt. I didnt know about them so I just went on with my life.

so there I was thinking ok so they have been there all along the only thing that has changed is my perception. ok have at it just like you always have done and Ill just go about my life like I have always done. no its not as simple as that but taking that attitude really helped me to move on beyond the anxiety/ worry stage.

my suggestion if this continues to bother you talk to your or a treatment provider, they will be able to help you find a way to accept that they have been there all along and move on beyond this realization back to where you can continue on with your life like before you realized this.