Unreality!

Can anyone please advise me on how to stop fearing depersonalisation/derealisation.
This morning I got up with a feeling that nothing was real. I tried to self talk, but my voice didnt seem to be in my head or belong to me.
I was asking my daughter what she wanted for her breakfast and it was like talking to a puppet.
I feel so trapped inside myself and cant get out.
How do I stop being afraid of this happening.
I know I must stop fearing it before I can desensitise, but dont know how. Its a viscious circle.
I dont even feel as though I exist...I cant feel myself.
Any advice please as I feel so desperate.
Thanks

i have suffered from extreme unreality, not recognizing my own voice when i speak, not feeling in my body, getting terrified when i look in the mirror and have no idea who i am. right now i am going through a weird thing where my tongue doesnt seem to fit in my mouth and i cant stand it. however, let me say, this ALWAYS passes. just dont be frightened to ride it out. its so hard to take your mind off of it but the one thing you can do is reassure yourself that it will pass, and remember that though these things feel frightening, nothing is actually dangerous. these are merely unpleasant sensations and they will pass. have you ever read dr. claire weeks? when i really feel terrible its good to read her books and remind myself.

Although the unreality feelings are really disturbing, they are actually protective mechanisms, believe it or not. It's been suggested that when your anxiety levels reach a really high level, this mechanism comes into operation, and your anxiety levels actually considerably drop when everything around you feels particularly surreal. So you should feel quite pleased with yourself next time you experience derealisation or depersonalisation, as your body is acting on your behalf to spare you any more anxiety. I know that's probably an impossible thing to do when you're in the grips of a panic and everything around you does suddenly seem extremely bizarre, but know that no harm can come to you and that yes, the time does always pass.