Never heard that with femara. And in two weeks, your gyno hasn't gone anywhere. You've lost water on the letro. Last, there was a European study of men with gyno who were placed on 40mg Nolvadex/day for six months straight, and the results were remarkable in the actual reduction of breast tissue.
I almost forgot, I get these "pains" when on the heavy androgens, and even taking Aromasin. I've had the same "pains" while on Arimidex, and Femara as well. The good part, is I've not had a gyno problem. Androgens don't come without side effects. What you're describing happens to be one. You may want to try some Aromasin, btw and have Nolvadex on hand in case the pains increase, or you feel a nodule forming under the nip. Hope that helps.