Positive OPK after ovulation?!

TTC4BFP
PLEASE don't read and keep going if you're experienced this chime in!!
Hello ladies wondering if anyone knows what could be happening here. I'm only 5 dpo but I wanted to randomly test with an opk not a pregnancy test- just to see how accurate those things are. Sure enough I actually got a positive ovulation result. 
What could this mean????? This is my 9th month TTC so id love it if this was an indication of an early pregnancy however seems a bit far too early even for implantation don't you think??? 
Anyone done this and get a BFP that month? 
Thoughts???

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