Underwire is typically bad for nursing moms, as others stated below, but I didn't have a problem with it. It wasn't terribly comfortable for me (and I'm bigger than you), but it didn't cause problems.
But I mainly responded to let you know that **all** nipples "point in opposite directions" -- it's normal, and I don't know why bra manufacturers decided that our nipples should point "front and center." They point out because that's better for feeding babies. :-) If you center your breasts/nipples for nursing, then you're likely to have a bad latch with lots of pain. :-(
So, I'd try an underwire at home for a few hours and see how it goes, and take your current bra to work for the first few days, in case you need to switch. Pay attention to your breasts while wearing the underwire, and if you feel constricted at all, or you start to develop any pain, discomfort, soreness, or anything else new, switch back. You do not want to get a plugged duct because of an unnatural fashion dictate.