Hi and thanks for using the forum.
It is not uncommon to have an "off" period here and there. So this possibly could just be an off cycle for you. However, whenever you have unprotected sex, there is always a possibility for pregnancy to occur ("pulling out" is NOT a reliable method of birth control). What you have described could possibly be implantation bleeding. It is a little early to do a home pregnancy test (in general you can test once you miss your period- some tests claim to be reliable a few days before your missed period). So, you probably need to wait it out for a little while. Also, if you and your boyfriend are not looking to have a baby, then you should consider another more reliable form of birth control- such as the pill or condoms. Good Luck.
Bridget
thank u..that was very useful..&thnks 4d heads up that we av bn ignorin..=D