The Condom Slipped 🤭🤭

So me and the Mr had sex last night and the condom slipped off whilst inside of me 🙊It was a little while before either of us noticed....Although he didn’t actually cum inside of me I am aware that pre cum can contain sperm, I am currently into the first few days of my ‘fertile window’ should I be concerned/look into emergency contraception or am I worried about nothing??