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Please read the information from Planned Parenthood, as you may need a "birth control make-over"! (Sorry if that was cheesy, but as you can see from this chart, your two forms of birth control are at the lowest as far as effectiveness from pregnancy!)

There are so many options for birth control, and using a spermicide (VCF) is not very effective when used alone. You can make it more effective with using the "pull out" or withdrawal method, female condom or hormonal contraception ("the pill").

So you know:
Perfect use for spermicide: 85% effective at preventing pregnancy each year
Typical use for spermicide: 71% effective at preventing pregnancy each year

This compares to perfect use of a condom (98% effective) and birth control pills (99% effective).

The other birth control method you used, the "pull out" method, also is not the most reliable at preventing pregnancy when used alone:
Perfect use for Withdrawal method: 96% effective at preventing pregnancy every year
Typical use for Withdrawal method: 73% effective
** and, please note, the withdrawal method is usually about 73% with couples who are not always using this method, as it takes much skill and practice with each other.

To answer your question: Your last period was August 20th, and you want to know if the light blood you see today is your period? It depends on so many factors: when are you expecting your next period? (Women's cycles range from 21-35 days in length or between the first day of each period). Taking Plan B can alter when your next period begins.

If you continue bleeding and you do not believe it is your menstrual cycle, please write back or call your doctor.

And, you probably want to call your doctor to talk about your birth control options, so you can make the best choices for your sexual health!