Well, from a woman's point of view. I would say leave it for maybe another day. Woman and men tend to handle arguments differently. A man is usually ready to forgive and forget after an argument and a woman usually stews for a couple of days before calming down. I think she is just giving you the silent treatment at the moment and is not willing to back down just yet. At work, don't ignore her, but don't pretend like nothing has happened (we hate that!!), then if possible on Saturday, go round to her house and ask if you two can talk. Bt then she will have calmed down. I also think there are so other issues at hand, if you've had 3 arguments in one week, try and get her to talk about it and remember to stay calm, do not get defensive or try and justify your behaviour (not saying you are wrong!!). I'm sure if you talk it out it will be fine. Also try and talk on neutral ground, take her at for coffee or a drink, that doesn't give one person the edge, so to speak.
Hope this helps some.

Tash