Suggest Remedy For Delay In Periods

Hi..me and my bf we both were virgins...we tried to have sex...but he wasn t going so inside of me....after that condom broke and his sperms fell on the upper side...i took unwanted 72 after more than 24 hours....my period was on 24th july may be...and we had sex on 29th july....i m not sure if something went in...now it s 31 august and i haven t got my period yet....plzzzz help...!!! Tell me if i m pregnant...or not...why are my periods so late.......????...