So, business trip at the end of the month and I'm over leaving my son for 3 days, but...?

Yes I went through the same feelings, wait till you take him on his first trip. I did and we suffered turbulence over the Indian Ocean at 2am and I was berating myself for ending his short life (needless to say everything turned out fine) but I digress. You gotta work to secure your boy's future and if this involves flying, then so be it. The way I think of it is like this: I make about 20 business trips a year and worry about the risk, flight crew might make 5 flights a day or more, 48 weeks a year and they don't seem worried, they have kids too! Then I feel a little better. So as you buckle up, look at the flight attendant and remember how many trips they do a year, and your risk will be put into perspective.