I had sex at the beginning of the month, right around time when my period supposed to come

i have done sex in the begging of the month i was suppose to have period at the end of this mnth... now its 2 nd july i am still not having period.. i am 22 yrs old but aftr whole day of working.. at the end of the day little bleed comes out. what does this mean nd what should i do?? plzz help me