Are opks always positive?

[anitagreen]

Ive been tracking my ovulation with them and all was fine. Im having a few faint lines very faint almost hard to detect on pregnancy tests I've taken an ovulation test just to see as I had spares and it's faint but two lined? I'm due on my af (hoping it doesn't come) on the 2nd September. X

I’ve never yet had a positive one, but BMR tracking shows where I’m ovulating.

It's strange as my af is due 2nd September so shouldn't be positive at all x

The OPKs I use always have two lines on them, it's just the strength of the line that is different at different times of the month.

Apparently there is always LH in your system (hence the 2 lines) and the positive OPKs show the surge before ovulation. Some women also have a surge before their period.