I'm 40, and for the last 3 times, my period had been a week later than it's always been. Just started thinking, "ok, so every five weeks then" and I'm now 3 days over that. I've no idea how to go about it, do i just sit back and wait for it to turn up, or does anyone know where I can get a job lot of cheap tests! I have no other symptons. We have been using condoms, and no leaks as far as we're aware, and v careful when using them. Asked my mum, and it seems that her, her sisters and my nan started in their early forties, so possibility of being perimenopausal high.