ok so i had sex wit my bf on the 11th of january and we were using a condom but than he took it off but didnt cum in me.. we went to the clinic and they gave me some pills and they said it will plush out everything i might have in me from him. I took the pills than later on i took a pregnancy test and it came out negative but im still concerned because i didnt get my period. can i still be pregnant? plz help..