thank you for using health care magic,
well if you had unprotected sex without any contraceptive
method on your fertile day then there are chances that you are pregnant .. some times bleeding occurs in pregnancy
also which coincide with your period date so you might take it as your period..
urine pregnancy test is not always reliable..
consult gynecologist and take more confirmatory test like beta hcg
level or ultrasound
in case if pregnancy gets confirm go under abortion
in future practice safe sex with use of condom or o.co. pills and if you fail to use it take i pill within 24 to 72 hours of unprotected sex..
hope this helps you..