+ or -?

This is my first time using OPKs. Every day that I’ve tested (started a day before fertile window) I’ve gotten very light lines. Today it’s a little darker, but I am not convinced it’s positive. I’ve been BDing every day or every other day just in case. Does this look positive? Or do you think it’ll get darker?

I’m on CD 17 and I have a 30-33 day cycle.

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