Oooh, so sorry, thekarens. I used to have (prior to menopause) very sore breasts as a part of the PMS but never any large cysts like you're experiencing. After my period the pain would resolve completely, and my breasts would shrink a cup size. I can only imagine how uncomfortable a mammo with a large, painful cyst will be, and I wish for you that it goes quickly -- and that the results of that and the ultrasound show that it's nothing to worry about.
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow