first time using OPK

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ first time using opk. there is a very faint line. according to Glow my ovulation day is Monday. should this be darker ?! do I have a good chance of getting pregnant this cycle if we bd tonight and monday?

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