That sounds shitty mate, it's horrible that you went through that. But I agree with redlocks, the chances are it will NEVER happen again. I've never heard of anythin like this before, and hopefully never will.
And as to help the situation, I reccomend smokin with people you trust, they don't need to smoke, but it's just nicer to be around people you feel comfortable with and can rely on if anythin happens again. If you do however smoke alone, just make yourself as comfortable as possible, make sure you have nothin to do, sit back and take a few hits. Put your mind at ease and just enjoy the high you know and love