Helpppp!!!! Don’t understand when to have sex to get pregnant!

Molly

So I have an 11 year old and just stopped by birth control in December...I have had two periods since stopping it, last one at the end of January. I do the ovulation strips but half the time I’m unsure if the line is dark enough..per this app it says ovulation day on the 14th of February..I just don’t want to miss my window. Should I just have sex everyday until a few days after that or every other day or what?!? HELP! I feel like a never before mom 🤦🏻‍♀️ I haven’t been pregnant in over 12 years! Thanks so much in advance for the help!