I posted a thread as my periods had suddenly become irregular and the feedback was to go to my docter, which I did,and all is well!! I had my hormone levels checked, and my thyroid, and they're fine and I'm now waiting to have a scan to check for cysts. So the moral of my tale is get yourself checked out if you're worried about a change to your normal rhythms, to thank the other mumsnet members for telling me to go to the Docter, it was the push I needed, and it's better to know sooner rather than later. I'm hoping scan will be fine but I feel 100 per cent better than I did.