I am 40 have had regular periods since i was 11.every 28 days int the last 3 months i have experienced the most awful PMT at the end of my period day 7,8 and 9.My breasts are also tender and i feel slightly crampy, why is this happening the period itself is normal althouth on two occassions over the last 4 months i have "come on" early ie a week early. I am driving my family mad. Please help