Do the lines seem to be getting darker at all? Are you getting any other signs of O? I usually get extremely faint lines (barely there) on OPKs all throughout my cycle but in the days leading up to O they gradually get darker. I hope you've got a good supply of OPKs though if your last cycle was 86 days! Having longer cycles is a PITA when you're trying to pinpoint ovulation isn't it!

Good luck!