HELP!!

I take Yaz (combination pill) I never missed a pill in my life, last night I thought my pill was in my bag and it was not. I just started a new pack for my cycle and I’m on day 6 so I missed cycle day 5 pill. I was supposed to take it at 6:30 pm last night but couldn’t take it until 7:30am this morning when I got back home. My bf and I did have unprotected sex last night, should I take plan B or am I protected since it’s just one pill missed? Please help