Any ideas? This hasn't happened to me before. I had a backache for a few days last week (happens quite often in the week pre-period) and have just started to bleed. Apart from the fact that I only had my last period less than two weeks ago, I'm also surprised because it wasn't preceded by PMT. I always get PMT - some months are worse than others, although the PMT I had a few weeks ago (before the period that started on the 8th) was monumental. It all seems odd.
Any ideas?