Pos. then neg. OPK in one day?

Becky
Ok so today I'm 11 days into my cycle. My period ended 5 days ago. Today I tested positive on my opk at 8am. Then around 2pm it was negative. Anyone experience this? We BD yesterday and today just to make sure. Can u have a false positive on your opk? I feel like day 11 of my cycle is a bit early to test positive opk, but I dunno- thoughts??

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