2 yrs ago i had a full 5 day period after not having one for 2 yrs so i went to my GP who sent me for a scan i had an internal and external one,i was then called back for a biopsy thankfully i got the all clear,then 2 wks ago i started getting tender nipples and breasts i also felt very pre menstrual eg moody,tearful then this morning i have woken to a period again,which is exactly what happened to me the last time,i have felt exactly how i use to feel when i was menstruating normally,i just don't undestand this,any advice ?