Have you gotten pregnant by having sex before and after a positive opk test?

Laurel
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I don't meet with my donor often and I'm way to obsessed with ttc so I'm trying to get s percent on to what my chances are of actually conceiving. 
NOW PLOT TWIST 
I had sex on 29th, positive opk 30th, had sex 31st. But I still have creamy cm. I actually can't remember the last time I've had EWCM or even just watery. I only have had creamy and dry. 
ANY AND ALL INFO HELPS. Thanks in advance. 

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