Hello there, please pardon my didactic tone. My answer here is making a lot of assumptions, but I've felt like that at times and thought it was worth a reply. I'm kind of writing to myself.
If you've been diagnosed that means you definitely switch and have others take over besides you. It also means that you experienced a great deal of trauma at a young age. It's is very easy for an ANP who fronts all the time (like myself) to tell him or herself that there is no problem or that there is nothing that can or should be done. This is part of the job you've accomplished for your system all this time--to keep life running, to attend to the goals of here and now. You are a part of a whole, and have other parts sharing the huge task of dealing with this life. Some of them hold painful memories, and deal with the unbearable past. Do you know who they are? What they are like? What needs they could use your help meeting? Do you know how they can help you? For me there has been a lot of fear around getting to know them, because to do so I have to acknowledge a lot of things I'd rather deny, but now that I have gotten to know some of them so well I could never go back to how it was before. I'm more stable, I'm not completely helpless when I'm depressed (because I can find out who is in pain and talk to them), and I cherish them. I implore you to get to know the insiders in whatever ways that you can. They have been helping you deal with life all this time without help or acknowledgement, and you have nothing less than your whole true self to gain from this. Approach them with respect and curb your fears as much as you can, try not to make assumptions about who they are, and go slowly and patiently. If your therapist has training and experience with DID, or if you can be referred to one who does, they can help you with this. This diagnosis could be a very good thing.