maybe you have a UTI? have you had sex recently? that can sometimes cause a UTI...also..there are many reasons for spotting..if you had had sex recently i do hope you used protection! if not and you are late for youre period i would definitely reccomend taking a home pregnancy test!

I agree with worrywart, but you don't need to be sexually active to get a UTI.

You should schedule an appointment with your doctor so that you can confirm and get some antibiotics.