The recommended fluid intake is 2-3 liters of water a day (or 4-6 12oz bottles). Water in food counts so this can be adjusted a little. If you are getting chemo, you must keep your fluid levels up or risk kidney damage. You will also feel a lot better when you arte properly hydrated.

I would try taking the morphine 1/2 hour before taking anyrhing else or trying to eat.

Congratulations on making it through but be aware that the radiation effects can continue for several weeks post Tx so you haven't seen the worst of it yet. Depression and thrush are things that will start appearing now also so be watchful for them.