Help me iam very tensed !! felling very stress !!

Patient: Hello sir ,i am 18 years old , i had recentntly o nthe 13th had sex with my bf but it was an unprotected one, i lost my virginity due to which i think i bleeded , i also tool an i-pill withing 50 hours. now iam not having my periods wich was due on 16th. till now no periods. i had taken test it was on the negative side but until which it turned invalid. am i pregnant? help me

Symptoms: There is no sign of symptom ! but i had one time vomiting