why i am bleeding before i am suppose to?

Hi,
Welcome to ehealthforum,
Most of the hormonal birth control measures start giving you effective protection after about 3-4 weeks of regular use. If you have been sexually active during these first few weeks without any additional protection, chances of pregnancy cannot be ruled out completely. The bleeding that you are experiencing at present could be the spotting indicative of pregnancy or due to breakthrough bleeding due to hormonal changes affected by the birth control use. If you are having symptoms suggestive of pregnancy, or if you suspect chances of pregnancy, you should consider visiting your gynecologist for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). If pregnancy gets ruled out, further investigations would be needed to rule out hormonal derangements, presence of infection or polyps or fibroids etc as cause for spotting/bleeding. Treatment as appropriate would be started to help you regulate periods based on examination and investigation results. Take adequate rest. Drink plenty of water. Maintain healthy diet. Be in regular follow-up and monitoring of your treating doctor/gynecologist.
Take care.

Thank you. But I would also like to add that I have been bleeding a little over a week now and my regular periods aren't usually but 3 or 4days and it doesn't seem like it's going to stop any time soon. When do you think it should stop before starting to worry??