Chances of pregnancy

I'm a FTM so I'm new to this

I had my baby a month ago today

And last my boyfriend and I had sex

We got caught up in the moment so didn't use protection he didn't come inside me but he did say there was pre cum

I got off my period 2 weeks

I am breastfeeding but not exclusively

I just want to know what are the chance i can get pregnant

I had a c-section if that helps