I would suggest you to find a good oncologist for advise .
Meantime, you shud start changing your lifestyle and diet with good natural nutrition from vegetable and fruit that will boost your immune system and have a strong body . U also shud exercise regulary , even an hour of brisk walking everyday is going to help .
I am stage 4 Lung cancer and since then have change my diet and life style . Although , after nearly a year of treatment, the chemo drug not responding to reduce my tumor, but, thks God that the condition are well under control and I am enjoying my day with family and friends .
Take care and be strong . God bless .