Oh surge and intimacy

Emma • 23 mummy to 2little boys
So I had my first LH surge 9am on the 12th and had another + opk on the 13th at 1pm. Just before midnight on the 14th the hubby and me dtd (he's been away so only just had chance) I still have ewcm. My question is, am I still fertile or is there no chance at all of me falling pregnant this month?? Thanks help really needed as first month doing opk and slightly confused