Does Delay In Period A Month After Non Penetrative Sex Indicate Pregnancy?

hi. I had outercourse on 29apr(genital to genital rubbing, semen was discharged in my salwar near thigh). I took unwanted72 xctly @72nd hr. My periods wer due on 4may bt came on 6may. & wer quite normal. Now its already 7th jun nd hav not got my periods. I took preganews hpt on 30may nd was negative. Cn i b pregnant. I m 19yrs, 5feet, 45kgs.