Once again I can only offer you the same advice GO TO THE DOCTOR, they are the only ones who really can help you, I know its Scarey, and really the mammogram is not always a big deal, everyone is different I suppose, but my first one was not painful, at all, however it depends on how good your technician is., where I go they are very good and make it as comfortable as possible.

It is probably nothing to worry about, but please DONOT ignore any lump, best get it checked, the sooner the better,with your mothers fibrocystic history, its probably a similar thing, but leaving it will only worry you sick, good luck, HOPE ALL IS WELL, TAKE CARE OK.