help!

So on Christmas eve, I should've taken my last active pill, but it was very late and I was distracted when I took my pill and I didn't notice that I took my first placebo instead of the last active pill I should've taken that night. My husband and I had unprotected sex and I didn't realize until the next day (Christmas) that I hadn't taken the active pill, that I had taken the placebo. Could I have conceived? I'm very nervous, he doesn't want kids yet and I do but if he isn't behind me 100% then I'll wait, but I'm terrified.