How Can I Avoid the Dangers of Smoking?

I've always been warned that smoking is dangerous, but a couple of days ago me and a friend had a cigarette. Everything was fine at first, but the next day, he got hit by a car. Now I'm worried something bad is going to happen to me too. What can I do to make sure nothing happens to me? Do you think I should go see a doctor?

Suggestion:

Yes, a psychiatrist would be best.

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