close to positive OPK ?

It's been literally one week since a very positive opk then 2 days later ovulation pains . Now today a week later I'm getting close positive . I feel it shouldn't be this dark still . I know to early to be pregnancy just thoughts ? I know your suppose to stop testing after first positive BUT I been seeing how woman say Clomid can give false positive so just wanted to be sure ... other days before now have been negative vvvvfl .  Today's just been the darkest and caught me by surprise ... 
Cd. 29.... AF due in 9 days .. 

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