PREGNANCY SCARE !

5 Days after my period ended my boyfriend & I had unprotected sex & he eejaculated inside of me . I took four birth control pills that day , 2 at a time at 4 hour intervals . then the next day I continued to take my BC on time as normal & have been doing so since . but my BF came in me twice & I haven't missed a pill in over 2 months . should I be scared ?