Me and my boyfriend got intimate on 14th nov 2010.I landed up breaking my hymen with the tip of his penis.However al this while we did not had any protection on as this wasnt planned by us and as soon as he entered me we realised this was wrong and stoped imediately without any further stimulation.I got my periods on 21st of this month.I did not tak any contraception after the incident.Do i still stand a chance of getting pregnant ? please help.