Positive or Negative OPK?

Sophie
Hope this is ok to post here, this is the first month me and SO have been properly ttc, never had a second line on any previous opk but I know the second line should be darker. What are your thoughts? My glow prediction for ovulation is the 23rd but my cycles been a bit erratic. First was this morning and second is half an hour ago so it is getting darker, yesterdays there was no second line at all. Any help would be appreciated X 

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