Possibly

Just had my baby in September. I am breastfeeding but started my period last month. I was kind of relying on the whole breastfeeding thing as my birth control, but no biggie if it didn’t work but after my period came back we started using condoms. We accidentally did the deed on the day I ovulated without a condom (thought it felt like forever ago I had my period so thought my chances were low). Anyone know the chances, ya know Breastfeeding and all and having my period back?