What are the chances?

I’m 18 weeks postpartum today, I got the Mirena on April 9th, had it removed May 7th & started the pill (Blisovi) on May 8th. May 11th I stopped my 9 day long period & had sex. My fiancé & I totally forgot I didn’t have my Mirena anymore in the heat of the moment & didn’t use any protection at all. What are the chances of me getting pregnant?