4th day with a light line on OPK

Sarabeth • Boy mom of 3, twin mama 💙👶🏼👶🏻👶🏼💙 Ask me about hearing loss 🦻🏻🗣
Today is the 4th day I've had a light line on first response opk. Saturday I had a faint line, then Sunday a little darker, Monday a little darker, and today about the same. Never got as dark as the control line. I usually only surge about 1 day before getting a dark test line. What's going on?!

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