I had unprotected sex 3 days ago, I am quite concerned even if I'm on the pill. My period should come in 13 days, so that would be 16 days after sex in total. Do you think a test would be accurate if I take it 14 days after sex, meaning 2 days before my period? I will be going on holiday when my period is due and will be stuck in a car all day long so I was just wondering if the test would be accurate 2 days before my period.