BD only 4 days before O! Chances of BFP?

I’ve heard that sperm can last up to 5 days inside the woman’s body, depending on the conditions. Husband and I only had the chance to BD on CD 12, i think I ovulated today, CD 16. What are the chances that we could conceive this cycle?

CD 12- Cm was creamy, turned a bit clearer and stretchier at night time. BD that night.

CD 13- Cm was super watery, with some stretch. Blood streaks at one point. Later in the day it became cloudy and a bit stretchy. Negative opk.

CD 14- Cloudy and stretchy, creamy at times. Negative opk.

CD 15- Negative opk in morning, positive in afternoon! Lots of stretchy, thin cm. 🤔

CD 16- Ovulation day? Ran out of OPKs. Pinching on both sides (ovaries?) mid afternoon. Cm has dried up.