Palliative care is all encompassing and MacMillan Nurses are the best at this. Palliative care is all about the family as a whole, not just the person that maybe dying, they tend to come on board fairly early so they can find out about any special needs that the patient or the family may have, they are fully trained to give excellent advice. They will look into specialist pain management (if required, it usually isnt) they talk to the family and will often help with financial, emotional problems and will be on call 24/7 to answer any concerns. They will also be totally honest whether you like it or not, people can cope better when they know what is coming and don't get unpleasant surprises.
Just trust them and talk to them about anything.
So sorry that you are having to go through this.