Am i doomed! Since the age of 17 i was a heavy drinker and cannabis user(i am no!

Am i doomed! Since the age of 17 i was a heavy drinker and cannabis user(i am now 21 and quit cannabis when i?

was almost 20) by heavy i mean that i Drank between 10-20 pints worth 3-4 times a week and smoked about 8-10 strong(skunk) joints(for anyone who knows for me that was about and eigth) a day.
During those years i managed a good meal about once a month when i went home, and lived of chocolate bars and bread and sometime microwave meals the rest of the time probably ate a portion of fruit and veg 5 times a week in the form of ketchup.

I was also a pretty heavy binge drinker from the age of 14 but lived at home so was healthy most of the time.

Someone told me that from smoking that much, i am at at much higher risk for lung cancer and many other cancers from the heavy drinking too. these prob. won't show up till later in life.

I now live really healthily, i dont binge drink often, never smoke, exersise 2-3 times a week, eat well and i feel healthy is she right!

I know my lungs were in a state but now i feel aerobicaly fit and last week swam 40m underwater. Am i fucked

Your lucky because you wised up while still young. If you continue to eat right and exercise you may turn up healthier than some who never did all that but doesn't eat right or exercise. If you quit doing all the good you are doing now then you will probably be in trouble. Do yourself one favor though, don't cuss (use vulgarity) when you don't have to. It degrades you and it sounds like you are really starting to care about yourself.