Advice needed

So today is cycle day 21 for me and this morning when i took the clear blue advanced opk i got the flashing smiley face for the first time this cycle. Something told me to take it again tonight and I got a solid smiley face. Well my husband and i had sex twice yesterday (even though I was unaware it was my fertile week) and we’re not able to have sex tonight. My question is, since we had sex yesterday, if we have sex tomorrow, is there still a good chance of fertilization?