Had unprotected sex, missed pill that day...?

So, I had unprotected sex with my boyfriend twice 2 days ago, I forgot to take my pill wheen I got home that day, usually, I take it at 9, but didn't get home till 10. At 5am, my bf reminded me, so I took it then. I haven't missed a pill lately, expt the one day I took it at 5am.. so, am I pregnate? My sister said I can't be, because she's done that before but.. I'm still paranoid. Thanks.