respected doctor,me and my gf is 25 years old,we had sex just 4 days after her mence occurs,unknowingly we had used an expired condom.her last mence date was 8th april.now the problem is she doesn't have period till today,she had done her urine tested but it resulted in negative,now sir is she pregnant?we are thinking of unwanted kit.is it safe to use?plzzzzzzzz help me plzzzzzzzzzzzzz