@JSN
Deep breaths!
That's a lot that you have been through and you were so busy doing it that perhaps only now the reflection of it all is ever present. Great that you are seeing a Psychologist! @kmakm has answered with a Yes and there are lots of others on here that feel the same.
An opportunity to have time off, reflect a little, smell the roses (as the saying goes) and try and find yourself - the new self, is a great idea!
Please come on here when you feel you need to as we all get it!
A Counsellor that I saw on the day of diagnosis had said to me if you start to feel overwhelmed then sit and pat yourself on the legs, one at a time, and then your arms and as you are doing this say to yourself this is me, this is now as it brings the focus back to now!
Hard yards but you will get there!
Take care and as I said deep breaths!