Are you charting your cycle?.. I found OPK's too confusing to use on their own, but in conjunction with charting it makes more sense.. Last cycle I got a positive OPK 4 days in a row which apparently *COULD* mean: 1 I got the LH surge but no egg was released so I got an LH surge again OR I ovulated more than 1 egg.. Which I think is possible as I had fraternal twins last time.. Anyway, not sure if I was much help, but I think when AF comes start charting