Hello
@Jean1511 and welcome to the forum
Yes, of course its normal to be afraid and overwhelmed in the stage around diagnosis, even if you are expecting it. Diagnosis suddenly makes it all very real and undeniable - unless you are the person with dementia who frequently does not believe the diagnosis, doesnt think they have changed at all, or doesnt want to think about it!
This usually means that you feel very much on your own with no-one to talk things over with. You have this forum, though, and everyone on it who has been through the same thing. You can ask about anything on here, or just vent when it all gets too much
xxx