I'm currently on CD29 and I've been spotting for the past week (some days quite heavily). AF wouldn't normally be due for another week or so - has anyone had this happen to them in the past? I've done a bit of research to try and find out what the cause would be but i can't really find anything. I've already had a whole heap of tests and ultrasounds done which all came back normal but now this spotting has starting i'm getting a bit concerned.