Hi Welcome to HCM
I have gone through your query and found you to be wise enough to understand & worry that your
smoking may have lead you to cancer .
Dear, you are too young to do all that and fall into this ditch . Anyway ,don't get panicked . You must go to the doctor to get yourself checked up thoroughly and get treatment ASAP as per your doctor's advice .
Meanwhile take care of your self . Stop smoking and fried ,fast foods , tea ,coffe , alcohol ,late nights . Take simple healthy food - veges ,,fruit , protein ,
vitamins, and minerals , lemon water before meals Garlic ,ginger are very good for curing many of your symptoms . Take 1/2 spoon turmeric with a cup of hot milk before bed time .
Keep
constipation at bay .
.Good night sleep , and walk and exercise .
Prayer and
meditation gives you peace and show the right way of leading life
. And don't worry , god willing you will be well soon . Go to doctor ASAP
Hope it helps you solve your query .
Don't hesitate to get back if have any further problem