Betsy-- I completely understand your personality characteristics! I too feel the need to analyze and diagnose and always assume the worst. DH says I am a pessimist, but in my viewpoint I just like to be prepared for anything that comes my way.
Why are you assuming the results are so bad? What were the stats that you are worried about? Remember that a lot of the time male fertility is a factor, but the good news about that is the remedies are fairly straight forward.
My aunt's husband has low motility and a few other things, and she has gotten pregnant three times by him (twice were multiples!) The third time they finally had to get an IUI, but she got pregnant on the first try using it.
There is hope, sweetie!! Don't give up just yet. And don't go picking up a nasty habit by smoking again! It'd be horrible for you to become addicted and then get pregnant! (Okay, I'm done scolding you.

)