should I be freaking out..

Here it goes, 2 weeks ago my boyfriend and I of 4 years wanted to try having sex without a condom.. I am on the pill. As soon as we started I got really nervous, I immediately told him to get a condom on.. he then ejacualted in the condom. Now I know that some people can get pregnant from pre cum. I just want to know if I should take a pregnancy test or not.. I should be starting my period next week. 

Any comments will help.