I know my cycle is going to be messed up since my chemical preg, but i used OPK tests and got a positive test about time OV was due. now 5days late and still gett BFN (using ebay cheapies) thing is.. on Monday 14th i did a OPK test again, and for some reason it came bk a strong postive.. what do u think girls..? i Ovualted late? but how did i get 2opk tests bk pos? at diff times in month?