I'm not sure any of those are positive either. It looks like your body is trying to ovulate though but is having some difficulty doing so. Hopefully it'll happen soon. I've ovulated as late as CD22 once so it is not impossible to ovulate late in a cycle. Only other thing I can think of is that there isn't much dye in that brand of test and that you already had your positive. On a side note I will add that during cycles I conceived, my opks stayed dark after ovulation for a few days, then eventually went negative and then became positive again. As soon as they became positive again, I got a positive hpt. Good luck!