I had unprotected sex on february 17 however my husband withdrew before ejaculating, the following morning of february 18 I got my period. It lasted four days and was a regular flow. On march 10th I had sex with husband and briefly before using a condom he entered me raw. As it is now I'm coming up on my period date and I'm really paranoid, its most likely to early to get a positive result from a pregnancy test and I'm currently showing no signs. 

What is the likelihood I am pregnant? If I miss my next period is it safe to say I'm pregnant?