Had sex on dec 14 and condom fell off, it was empty, on bc for a week prior to that, on 6 day of sugar pill, no period, could i be preg?

You could be: There is a chance of pregnancy since you just started the pill. And you mean Nov 14th, correct? But if you started on Nov 7th then you wouldn't be on day 6 of sugar pill already (?). We need some clarification on your dates. And clarification on when you had your last cycle. Did u start after a period? And go get a pregnancy test.