Not TTC but not not TTC

So questions - just out of curiosity. I know pre-cum doesn't contain sperm unless there has been a recent ejaculation. So my husband and I are considering starting to try we're currently using condoms at orgasm but not until right before. 
So I'm on day 10 of cycle. Last night we did round 1 - condom on right before orgasm. We then went for round two almost instantly (my husband works out of town so weekends are fun 😬) I do know there was precum. He didn't urinate between rounds and we didn't use the condom until right before orgasm again. 
So... Any chance? We're just a little curious we're not really planning to try until January but we wouldn't be disappointed if it happened sooner. Thanks!