Ovulating but we are running into a problem....

Soooo my husband and I finally decided to start trying for baby number 2 after a devastating loss in 2017 and then a deployment from 2018-2019. I’m finally ovulating (got a positive opk yesterday) but my husband literally cannot cum...we’ve had sex two days in a row and he just can’t do it. Any chance I could get pregnant from the precum? I’m soooo sad lol.