Please help

I am so wanting to give smiling up I have Colon Cancer and due for surgery on 2Feb My family are so annoyed as I just find giving up so hard With these people on my back Is making me angry

I know I Should it be smoking but I feel I will do it in my own time with patches Have any of you tried the medication you get from the doctor?I have heard there are side effects

I need you help!!! Thanks