Slightly freaking out

so im in a fairily new relationship. we get together every now and then and enjoy each others company but were not dating. mostly because he's staring his own business and wants to focus on that. and i completely get that. we basically have an understanding that we have all the benefits of being a couple without the so called "title". we had unprotected sex one night right before my last ovulation cycle and im kinda freakin out at the possibility of being pregnant. we havnt actually had the conversation yet but im pretty sure that we would have the couple "title" by now if it werent for his business. he has made comments about how cute our kids would be but i dont have the desire to have any of my own. its just really waying on me that there is a possibility of pregnancy and im not in any form of a stable relationship for that to be the case. i have about a week and a half before my next period to know if im in the clear or not but until then i dont know how to handle my wondering mind.