I had sex last Friday and I had already had my period. I was just ending it when I had unprotected sex and I missed taking the last pill of my placebo week. I took Plan B and spotted three days after. But i have not had access to my birth control pill this week and I wont till Monday. Is there any chance I could still be pregnant. Im worried because i've never been this irresponsible with taking my pills and I've never had unprotected sex. Could I still get pregnant?