Unlikely, but it depends on when you ovulate. Many women are under the impression that it is always 14 days before your period, and this is not true. It's possible to ovulate and conceive anytime, including during your period. Sperm can survive in a female for up to 7 days in the proper conditions, so you should never have unprotected sex at anytime unless you're in a very stable relationship and could handle a pregnancy. Wait at least 2-4 weeks and take a test with first morning urine.
theres always a chance of pregnancy b/c womens ovulation times vary. some women have a period while pregnant. if you are pregnant it wouldnt just cause your period to stop. i would say chances are very very slim that youre pregnant