I've never really suffered from PMT until the past year, when I have realised that the day before I ovulate I am totally awful, like having a huge black cloud over my head, everything and everybody totally pisses me off and I am snappy and aggressive (verbally) to DH and DCs 
I am only 42 but wonder if I'm perimenopausal as my previously 26day cycle is going a bit haywire (5-6 weeks between the last 3 periods) and this week, only a few days after my period had finished, I was in an evil temper again but for 3 days, I literally felt the mood melting away and my normal, calm and sunny disposition return! The following day I am pretty sure I ovulated a mere 8 days after start of last period!
Is there something, preferably natural, that I can take to try and smooth out these moods? They are making life pretty unpleasant for all of us and if it is the start of the menopause, I'm concerned they'll only get worse!
Sorry for very long post and lots of info,
TIA