Seems like a popular week for mammos -- I had mine Monday afternoon! I have read to schedule them during the first two weeks of your cycle if you tend to have sensitive breasts before your period, and that has been a very helpful tip for me. In fact, I had to reschedule this one from a couple of weeks ago for that very reason. The compression isn't what I'd call comfortable, but when your breast tissue isn't sore and swollen from hormones, it's certainly less of an issue!