Period

My period is 2 days late and last month it was 1 day late and I had unprotected sex 2 days before it was meant to come so it came 1day late than when I was 20% chance of pregnancy we had unprotected sex but he came outside and 4 days ago I had protected sex and he came outside even though he had a condom on and now my period is 2 days late. I'm too scared to take a pregnancy test and my friend is telling me I should worry cuz once she missed her period for 9 months took a test and it was negative...so am I or not pregnant???