Sore breast?

Andrea
I took provera (I've taken many times before) at the end of January had my AF beginning of February had some soreness but not much on CD 3-7 I started my first round of clomid the past week I have had very tender breast, they are really sore and I have never had them sore for this long. My AF isn't due until the middle of March has anyone else had this problem? Could it be the clomid??