And as I have posted before, my SIL went back to work and was having trouble keeping up with her ds needs....her good friend told her "You know, formula isn't rat poison!"
Keep it in perspective. It's nutritious and good for babies. BF is best, but there are wonderful alternatives in this day and age and we can all be grateful and rest easier knowing our babies will not only not starve, but also thrive with other options. And YOU can stop worrying about it.
I know when I began supplementing with a couple of formula bottles per day, I felt a bit strange about it at first. Claribel had colic and I thought for sure she would react poorly to formula, but a friend suggested I give it a try for a couple of days. You can always change your mind! To my surprise, she had no adverse reaction! I used one for gassy/fussy babies, with 1/4 the lactose of others. It isn't as expensive as hypoallergenic and she still loves it at almost 10mo!
Working moms (by that I mean also working out of the home, because SAHMs are workling, too!) need to strike a balance, and that balance is always changing. Go easy on yourself and remember that you're doing what's best for you and your baby. Everything will work out.
-Anita