Welcome to Cancerchat and hope others will be along to offer support/understanding during this difficult time for you.  Though not a sufferer myself (it was my husband) I found it useful to write down any questions when keeping appointments  (and possibly the answers too) as sometimes so much information gets forgotten when you get home and have to digest it all.  Hope you have  some treatment outlines when you have your chat on Monday and it may possibly be stress playing a part in your weight loss too.  My husband used to find little but often on the food/drink front if you can manage it. 

It may be worth putting your kind of cancer in the 'title' of your thread then other readers with understanding can offer some support.  Hope you feel able to let cancerchat know how Monday's appointment goes. All the best. Jules54