Did you take an OPK on CD# 14? It looks like it's very possible you could have Oed then. I wouldn't be totally shocked to see FF change your O day if your temp is in the same range as it has been over the last 2 days and your EWCM has stopped now too which also makes me think your O day could be on CD#14. As far as the ferning... It's not always 100% something you can trust. I like to think of it as more of a backup to other fertility SxS like OPK's, temps, CM, CP...
Now the soy.. I have no clue about.. Sorry I'm not much more help!
But! Good luck this cy anyway