My dad has been diagnosed with stage 4 lung cancer with mets to his liver, rib and 2 bones in his spine, just under 2 weeks ago. 
The only symptom he had which caused his diagnosis was severe pain in his rib which he had to be hospitalised for. They've said he will be having treatment and he is having a biopsy this Wednesday. 
The palliative team came out on Thursday due to his pain not being managed with regular pain relief, and they've prescribed slow release morphine 2 x a day. 
He has been constipated for weeks due to taking a lot of pain killers (before and after his diagnosis). At the weekend we started him on Lactulose 15ml twice a day. 
He has managed to no longer be constipated but has gone the complete different way, he's having severe diarrhoea and vomiting. He's been unable to keep water down for the past hour without it coming out either way. My sister is on the phone to 111 due to us calling his lung cancer nurse and advising us to call them. 
I'm terrified that this is a bad sign that his cancer is spreading too quick and that he won't even make it to his biopsy on Wednesday or he will be too weak for treatment. 
If anybody has experienced similar please let me know I'm so scared