Welcome to HCM.
17 years is pretty long period and indulging in alcohol and smoking
for such a long period is certainly going to affect your body adversely. If you ever get an occasion to see people affected by these, you will need no other push to completely wean yourself from these unhealthy habits. People whose liver
is damaged beyond repair, end up throwing up blood and their final days are really miserable. Same can be said for chronic smokers whose lungs get damaged beyond repair and turn malignant, spitting blood, spending sleepless nights sitting up in the bed coughing and gasping for breath. We being doctors had many occasions to see such patients who have repented their unhealthy habit a bit too late.
The horrific picture I present is not to scare you but to wean you from these habits, while there is still chance of coming back to complete normalcy.
30 is too young a age to be destroyed in this way. I think if you decide and stop smoking and consuming alcohol, right now, you can completely regain your full health and vigour.
My best wishes are with you.