I was taking valtrex (2 a day for 7 days) at the beginning of this month. Usually my breasts get pretty sore at least 4 or 5 days before my period, and i'm supposed to be getting my period, well, pretty much a couple days ago, but my breasts aren't even sore at all, and I don't have it yet! Right now i'm getting that discharge that's supposed to indicate that i'm ovulating..I think! I was just wondering if the valtrex might have anything to do with my period being late. Also, i've been really stressed out lately...That could make my period late too, right? Could it be a combination of these?