I started OPKs a few days ago and I don't even have a second line, which is odd. Usually I have at least a faint second line. I am using a different kind than usual (the 20day answer strips) but still.
I guess it's possible I missed it, since I didn't start testing until my HCG had been zero for a week or so and I've read some women ovulate once HCG is back to 'normal' levels.
Just looking for some ideas