Dadsdeercamp, that's not the news we wanted. Of course you will be worrying like crazy, that's natural, but please do all you can to look after yourself.
Get all the support you can. Your family and friends of course, and find some support groups, people to talk to that have been through what you are going through, who have advice on coping with this big shock.
Work at being as healthy as you can, healthy diet, sensible amount of exercise for you (your diverticulitis may effect this) and a mental attitude to help you fight.
This cancer has been diagnosed with you, and everyone is on your side and wants to help you win, it hasn't got a chance.
xxx