Should I take plan B?


So my boyfriend and I are both pretty new to sex, and I am not yet on the pill. We had sex this weekend. Yesterday he started looking into how effective condoms are, started worrying, and suggested I take plan B.

As far as we are aware, we used the condom correctly, and I was on the fifth day of my cycle, the last day of my period. After talking it through he feels less worried, but I’m wondering if I should take it just in case. Thanks in advance!