Deep breath, big guy. It's not the end of the world, as others have said. Assuming that you two are ready for this, this sudden change in your lifes' plan will probably be for the best.
And as others have said better than I (with actual Science!), don't sweat the alcohol and OTC drugs. If it were later in pregnancy or more of it, you might have a slight cause for alarm, but most folks here have stories (if they've asked) about the stuff their mothers did while pregnant. It wasn't until about 20 years ago that drinking during pregnancy became a big deal, but the Pyramids still got built, as did Rome and the Great Wall of China.
You should bookmark this thread and come back in 5 years to tell us about whether or not you'd have rather had one big night in a casino or the kid.
