Hey there,
I can understand your worried about loosing your CPN and theres nothing wrong with ringing to ask him exactly what he meant with what he said to you and if you will be seeing someone new. If you ring and he's not there i'm sure someone will take a message and let him know so he can ring you when he gets back to the office, this is what usually happens if I try to contact my Mental health social worker (who does pretty much the same thing as a CPN would do for me).
If your current CPN has changed jobs and this means he can see you less it might be worth considering that seeing someone new could be of more benefit as they can focus more on you and see you more often...how does that sound?
It does sounds like your current CPN is very caring and wants to do what is best for you, there is nothing wrong having a chat with him over the phone to ask for clarification on your situation and also to add the details you forgot to tell him about everything that is going on in your life at the moment.
(((hugs)))