Hello Wayne, I've just seen your post and wanted to say hi.  I don't know how to block those thoughts, it's human nature to think ahead and I did that for five years during my husband's palliative care for stage 4 lung cancer, he was 69 when diagnosed but we had young grandchildren by then and it was hard to think ahead.  So we just made each day the best it could be and built lots of memories for everyone to talk about.  It must be extremely hard for you and your wife, no one understands unless you are dealing with it all.  There are always others on this forum who will pop on and say how they cope but I send my good wishes your way to you and your lovely family.  Carol x

Hi Wayne,,these thoughts do  keep popping into the mind nomater what we do, but we try to forget now and again, with keeping busy, things to consontrate on mostly. 

I myself have prostate cancer gone to lymph node's pelvis spine ribs and a lung, was diagnosed feb 2016, uncurable later palative care, stage 4, permanent meds.

I'm also a carer for my darling wife who has alzimers and parkinsons plus other problems. That keeps me busy and keeping positive and sure. 

Gardening and housework, cooking, also keeps me going.

I started treatment with hormone therapy and chemotherapy soon having radiotherapy as my uninvited guest bit me again. 

Try to keep occupied and move better thought. 

Billy