Opk help

Bebe • Mother of 1 little boy🙇🏽‍♂️,Girlfriend to an amazing boyfriend 💏 , MC 9/25/18👼🏽 my 🌈 👶🏽 10/7/19 Baby Cameron 💙

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