i had unprotect sex 2-3 weeks ago and i took the 72 hour pill i took it in 35 hours early and the next and i still had my period at first it was light but then heavy and i went to have test and my doctor told me that the test was negetive.

could i still get peragenet??? pls give me answear im freacky out and also scared i am not ready to have a baby at the age on 15.