Pull out method

I had an unplanned chemical pregnancy last month. I should be in my fertile window now. My discharge makes me think that’s correct. My bf and I have had sex 3 times in my fertile window. He pulls out. Obviously I KNOW pull out doesn’t work because that’s how we got pregnant last time. Smh. Is it possible to get pregnant the month after a chemical? What are my chances? We are not TTC.