Feeling like a selfish person

I feel awful today, my beautiful daughter went to the doctors a week or so ago with the change to a mole, thankfully because of my situation she has chased it up quickly.  She has a fast track appointment next week, it looks like her hubby can't take her.  I can't let her go on her own, she may not be allowed to drive home.  My issue, my feeling of selfishness comes from the fact that hubby and I were supposed to be taking a few relaxing days away, boy I need them.  Since my diagnosis we haven't had a proper holiday or a relaxing break.  I am in a treatment cycle again and have been allowed to go back to work for a few hours a week.  This means to go away again we are tied to school holidays again.  The next holiday, Whitsun is a treatment week, so no break that week.  After that it will be the summer holidays, now my problem with that is that the consultant is not overly optimistic, do you remember the it is time to prepare for the end appointment?  What if I am not well enough to travel my the summer, or worse?  How would hubby feel if he missed a last chance to take me away?  Now you and I know that the consultant is wrong, but the doubt seed has been planted in my head.  I am not planning anything very far ahead until I know if we can get some control.  I saw the consultant yesterday and told her I would shorten my targets, control first and then see what happens.  She seemed pleased with that but this treatment is just the 6.  What then?  She doesn't know yet there may be something else, maybe not.  What if not?  That will all have to wait until after the next scan, that could be another 7-9 weeks yet.  I feel much better than I did last week, but it is treatment today, and after the last one I was wiped out for several days.  I hope that my daughter's hubby remembers how important this is and tells his boss, I handed the baton of care over to him in October last year when he said "I do".  I hoped I had passed it to safe hands, please don't let me down.