Mark
Sorry to hear that you had a row with your old man, to be honest mate he'll get over it. You need to be positive & concentrate all your thoughts & energy on beating this illness. You don't want/need to be worrying about an upset parent.
I know where you are coming from with fearing the worse at this stage. The journey you are now going through is full of highs & deep lows, exactly the same thing happened to me earlier this year during my fight with Cancer too. I always thought that I was a switched on level headed kind of bloke but when one minute I was happy as Larry & then breaking down & crying like a baby the next it was very scary. I was lucky in that I was able to talk to some guys off STW who had also been through this & they told me that this was 'normal' for the emotional roller-coaster you are now riding. It’s not an easy journey but it is one that you can win – you cocky surly b*stard 😉
As has already been said take it one day at a time, keep yourself occupied & don’t dwell on matters, don’t put off those things which you can do today, set yourself small but achieveable goals, don’t bottle things up, speak to people & share your hopes & fears, be strong, be positive & be focused on your future together with Meg.
Good luck mate & I hope to catch up someday on a ‘petesgaff/Mark & Meg STW ride’