Father/ narc husband

Hi to all the lovely ladies,
It's been a while since i have posted. Still NC it's been 4 months since I have heard from the exN husband and 6 months since the d&d when he walked out of our marriage and moved on like I never existed.
I learnt months ago that he is with the girl that he cheated on me with ( his co worker) surprise, surprise.
Anyway I was doing really well, reading, working on myself, I am seeing an amazing therapist who specializes in PD. Through our counselling she has come to the conclusion that he is a sociopath as well as narrcisstic.
I have realized recently that as much as I understand this disorder I was still very much in denial and simply just did not want to acknowledge that he is who he is but it's got to a point that I can no longer deny the facts.
The last month I have gone downwards dramatically to the point where my counsellor know wants me to go on anti depressants.
My dad was diagnoised with prostrate cancer one month ago and had his prostrate removed, now we have found out that the cancer has spread to his bladder and that it is a more aggressive type of cancer.
When I first found out I wanted to contact my exN husband, out of all my family he was closest to my father. It was hard for me going through this without the support of my husband, but I got through it.
Since finding out about my dad I have been in a bad depression which I have been unable to crawl my way out of.
When I was growing up I felt very unloved and abandoned from my father,I worked really hard to try to gain his love and attention.
I saw many similarities in my exnh and my father and whilst I think my dad had a few narc tendencies it was nothing compared to my husband!
My dad is not the same man he was when I was growing up and we have worked really hard to get our relationship healthy. He has acknowledged and apologized for the way he was when I was growing up and I have forgiven him as I know have a better understanding of his childhood.
My counsellor thinks that the reason I have gone into a deep depression is related to my fathers illness, my exN husband and my issues with abandonment.
My exN husband abandoned me and now my father is I'll with aggressive cancer and I don't know what will happen to him.
I think she just might be onto something with this... Even though I have sorted my issues out with my father to an extent the damage has been done.
Being with my xNh felt so familiar I would always say to him that being with him felt " home".
Thanks for listening and I welcome any thoughts,

Eyes, xo