Breastfeeding to formula

I'm feeling guilty about wanting to formula feed when I go back to work. I've got two more weeks before I need to start and I don't have any breast milk bottled up because I only pump two ounces. And I can't pump at work because we don't even get lunch breaks I'm not sure how I'd be able to pump anyways. I mean I'm going to HAVE to start formula feeding is what I'm getting at but I don't know how my family is going to respond to this...one side is very for breastfeeding for two years and the other is all why am I doing it in the first place.

I really just don't want to go back to work, I'm used to being a milk cow and I'm not looking forward to the pain of drying up.