Hi,i Am 21 Years Old.i Had Sex With My Bf

hi,i am 21 years old.i had sex with my bf on my 2nd day of my period. I took unwanted 72, 22 hrs after sex ie., on my 3rd of periods. my periods stopped on 4th day, since then its been 7 days i am getting spotting, is this the effect of contraceptive pill? when will i be getting my next periods? Will i stop ovaluating for rest of my life because of spotting or will i be pregnant if i dont get periods on time?