Where in your cycle are you? If you're not due to start your period any time soon, it could be from ovulation. If your period is supposed to start soon (within a week or so), it could be implantation, or it could be spotting before your period starts; you'll have to wait and see if your period does show. At any time in your cycle, it could be from having sex, so that's a possibility if you've had sex recently. If it lasts, if you keep spotting and nothing else happens, then take a test and talk to your doctor. If it goes away, then there's nothing to be done whatever the case, and you can only guess about the cause after your period shows (or doesn't).
at 4:20 PM on Dec. 13, 2009