Insight on missed pill and emergency contraception

Vi

Hello!

So I missed my pill yesterday and noticed when I went to take my pill this evening. It’s the first week of my active pills (combination pill) and I’ve had unprotected sex yesterday (Monday, the day I forgot to take the pill). I suggested taking plan b but my partner doesn’t think it’s needed and doesn’t want to spend the money. Any insight? Any opinion if I should get the plan b? Thanks!