I am 7 weeks pp.....pregnant.

I am 7 weeks pp and at 6 weeks me and hubby did the deed. After it was all said and done we realized condom was broke. Now I'm terrified of being pregnant again. I ebf my son and don't want to have to quit bc of a pregnancy. Of course if I was I would keep the baby and love it but right now all I want to do is cry just thinking about it. I hadn't even started my period so when could I test to see? I'm so scared