Can I get pregnant if I have sex in the first day of my placebo pills?

So I've been using birth control pills for about a little over a year (like a year and two months). About three weeks ago I went on a trip and forgot my pills. I went like three days without hem and my period came early. I talked to a nurse and she said I should start a new packet. So I wanted for y period to end and I started the packet on the same day I always start, but one week earlier than was scheduled if I wasn't stupid and left my packet on the trip. So three weeks and and a day later I had unprotected sex (on the first day of my placebo pills just before my period is supposed to start)