Positive opk's for 3 days ?

Carol • Mother to 2 lovely kids Liam age 9 and Penelope (Penny) age 1 , also expecting baby number 3 due September 2016 ! 💙💗
Hey all , I thought I was in the tww but I've just had my third smiley face in 3 days on CB digital opk . Has anyone else had this ? I usually only get 2 days postive opk's so have never experienced this before . I'm guessing I should BD tonight as well !! Any advice most welcome 

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