HELP!!

Okay so my boyfriend recently had sex on Friday and again on Sunday.. yes I know it sounds we're super thirsty whatever. I'm just here for help. Anyways, we didn't use protection on either days, in which he came in me both days and I was also in my fertile window. Well I'm supposed to start my period next week. Is there a possibility that I could start next week and still be pregnant afterwards since It just happened so soon? Should I test after my period to make sure??