Possible pregnancy? TMI possibilities

So about 2 weeks ago me and my boyfroend of 2 and 1/2 years had unprotected sex two days in a row two times both days.  well now my period is two days late. i took a test today but it came up negative. we have unprotected sex all the time and ive never gotten pregnant before and because of possible PCOS or endometriosis we just thought that i cant have kids.  well at least i did.  im not having any symptoms though other than the elevated sense of smell that ive really noticed.  could i possibly be pregnant?