And, really, you probably aren't even doing anything "wrong." I currently know plenty of gainfully employed, happily married people who were dropped as babies. One of my closest friends was a month premature. Another friend of mine apparently cried 15 hours of the day for the first three months of his life, and he's still pretty cool.
And as for that whole "breast is best" pressure? I had a friend who had a terrible time with breastfeeding and felt awful about it. Don't feel awful about it. In six months, your kid will be eating with a spoon and this will all be a distant memory. And, hey, for the most part, I was formula fed, and I'd like to think I turned out OK.