Opk help

Bebe • Mother of 2 amazing boys🙇🏽‍♂️,Girlfriend to an amazing boyfriend 💏 , MC 9/25/18👼🏽 my 🌈 👶🏽 8/26/19 currently pregnant with baby #3 a baby girl 🎀 coming 2022

Ok so this is my first time doing opk strips and I’m so confused I’m in my second day of my fertile window but my opk is saying negative/low should I just wait 2 more days and test again? I’m nervous