Do it even the likely hood of false alarm is very big because the mammo x ray is very sensitive. Try to remember the date you had your mammo, did you do the mammo when you feel breast sourness, just before the menstral cycle? My ultra sound technician told me her finding right way, because she is very sure I do not have the lump mass as it were showed in my mammo. The offcial diagnose came later from radiologist.