If she was only with the buck for two weeks then the math is pretty simple. Goats gestate for roughly 145 - 155 days. Count forward from the time she was with the buck and that gives you about a two week window of time, plus or minus a few days variance. Watch her bag and feel her ligaments and RELAX and enjoy the miracle!
Did you have the babies yet?
And by the way, I can say with some confidence that she is Nigerian Dwarf instead of Pygmy. That white with gold marking is fairly common Nigerian color pattern.