Negative opk can I still get pregnant?

👑💪🏻Rhiannon👼🏻👼🏻🌈👑❤️🤰June 2019🌈

TTC for 4 months...... I've never had a positive OPK.....😢😢😢😢 glow is telling me I'm in my fertile window now❤️ what am I doing wrong? Tips? Can I still catch with no LH surge?