There is a difference between age regression and little alters. Without more information on your symptoms no one will be able to assist properly though!

I find with my little, I have lapses in memory and my ADHD and anxiety spikes. I don't know.

age regression and having littles are different--we have both. little alters and always children. age regression is a coping mechanism where you revert back to a younger state of mind. i can say that you only need two alters to have DID

It's true you only need 2 alters to have DID, but as others have said, they are incredibly different and a system little has no relation to sexual littles. System littles are mentally children. And age regressing or having an "inner child" is incredibly common among singlets (especially ones with other disorders) so without more information on the actual dissociative symptoms you experience, it's hard to say if you have a dissociative disorder! Good luck on your journey though 💗