Hi..I Was Supposed To Have My Period Last 12th July

Hi..I was supposed to have my period last 12th july but it didnt come. I waited. Until 22nd july, i took pil to delay my period because i went travel and during my vacation i had 3 days unprotective sex in a row. Today it has been 17 days late an u stopped my delay pil on 26th july. Am I pregnant? Im not ready. Is there any way i could induce my period?