Ok, so this is the deal....I had a positive OPK on days 15 and 16. I've still been POAS every day since, just to be sure I did O. Today is day 22 and this morning I had a positive OPK...probably darker than the ones on days 15 and 16. What does this mean? Could I have been wrong about O last week and it's happening now? Or could the + OPK also mean a + pregnancy? So confused!