I Ovulated On CD19th And 20th From The First Day

I ovulated on CD19th and 20th from the first day of my last period. I had sex all day on 15th, 3 days before ovulation day. Could I still get pregnant? I also had sex all night on CD 23 so that would be 3 days after ovulation.

I think I had half a days ovulation on 18th and half on the 21st either side of the two full days - 19th and 20th.

I experienced creamy CM before sex before CD 23.

Any help or advice is much appreciated.

Thank you