What does a faint line mean? How much time do I have?

Khin • 💖Recently married | 24 | momma to a baby girl 👶🏻

Hi first time poster !

I was just wondering what does a faint line means in terms of time. What does a strong line means for time? Like what is my time window, I've read that after a positive ovulation test the fertility window is 24-36 hours? Is that true?

Would appreciate any info!

✨💖✨💖✨