Hi Karen give yourself a break, it is a tough trip. This site is good for a vent I have done it more than once and I have always got a response from others who have felt the same way. I went to a counsellor and it helped me to be able to tell someone how I really felt, without feeling guilty or offending family or friends who were wonderful but I found there were some things I couldn't talk about to them.
Take a big breath have a cry and tomorrow is another day. I think I could have filled buckets during treatment. Take care