Ok so what's my chances

My daughter is now 6 I used clear blue ovulation tests I can rember when I got my smiley face but I tested 4 weeks later and sure enough I got my bfp ttc number 2 with no luck I haven't used the digitals again I've just been using the lined opks on Letrozole 2.5mg my question is do u think they would work again been ttc for 2 years for number 2 thanks 

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