I haven't had my period in over a month. This morning, I woke up with mild cramps, the type I usually feel before I get my period. My right breast has also been feeling very strange (random, dull aches ) and my right nipple gets stiff, then goes back to normal. It s also somewhat tender to the touch. Is this a pre- menstrual symptom. I m sorry, I forgot to mention that I am DEFINITELY not pregnant . And I have had missed periods before.