Amazon tells me that if I order in the next 5 hours, I'll get the tests tomorrow. If it weren't for the fact that DH would get email notification about the purchase (his account is the prime account), I'd go ahead and do it. But he'd want to know why I was buying more tests when I still have the ones he bought last month. There are two remaining (of 3 - when he brought the bag in I thought there were at least 5). That's not enough for me to test with impunity!
But I suppose that I can live with my plan of testing Friday, and then again after AF is due if necessary (next Tuesday should do), and then buy them if this isn't the month.