Did I just have a Miscarriage?

As you know I had the weirdest period this month. It started out with just spotting and very light flow on the first five or so days and then for the past 8 or 9 days I have been bleeding heavily.

I was talking to a friend of mine who suggested that perhaps I had had a miscarriage and didn't realise.

It's certainly possible and would explain my bizarre period. But I guess I'll never really know for sure because I don't know if I was actually pregnant or not.