positive OPK but not ovulate

Sarah
Background 6yrs ago I had my son I had to take clomid to get pregnant 
Anyways my husband and I got pregnant in the Spring which ended in a miscarriage and D&C we had protected sex basically all summer and early fall 
I've had positive opk's in November and December waiting now to take a pregnancy test the end of the week but I'm concerned I am getting a rise in LH but not actually ovulating. Has anyone gone through this before?? 

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