sorry to hear of your loss,l to lost my father recently,very suddenly.he was 4 days out of a 7 wk chemo/rads for tumour attached to back of tongue and voice box,inoperable but showed no signs of being sick at all other than a bit of tightening of the neck,and was doing well,no sickness no weight loss,still using peg,we were waiting on him getting test results to see if the treatment had worked.hes passing was sudden,out of the blue, got out of bed one morning fell,we got him back on his feet and put him to bed while went to call the nurse on call, he was a little muddled/confused with what had happened but ok,5 minutes later he was gone,not breathing and we still dont know what it was that took him from us so suddenly,we do know it wasnt the cancer or his heart so i understand how you feel,not knowing is terrible.it makes you wonder if the treatment or operation was worth the torture it puts on there body and with out it would they have had more time with us,with my dad it was hard as he couldnt speak clearly due to extreme swelling of the mouth from the treatment,so we wonder if he was trying to tell us something and we couldnt understand,mistaken his groan type noises for some kind of feeling he might of been experiencing... its the not knowing the wondering and all the what ifs....all i do know and am sure you can understand is they are no longer in any pain and are resting in a peacefull place somewhere having a beer and a bite to eat... my thoughts are with you xx