3 weeks after d&c and confusing OPK

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I said to myself I wouldn't analyse my opk results because my body needs time to heal. 
I don't ovulate naturally but amazingly did and got pregnant only to miscarry at nearly 12 weeks. 
Anyways, started testing (3 weeks after d&c) on clear blue dual hormone fertility Monitor (the one that helped me get pregnant) and had low fertility for 3 days, missed two days of testing and then today got peak fertility!! No periods of 'high' fertility.... 
Any opinions here?