If you suffer from premenstrual syndrome, rest assured you are not alone.
Nicole Kidman and Keira Knightley are both sufferers and PMS is said to affect a staggering at least 7 in 10 women. 1 in 3 women even say the problem is so debilitating that it interferes with their daily lives.
Lorraine finds out more about an affliction that affects so many of us and finds out what can be done to decrease the symptoms.