I'm 10 dpo today. At 7 dpo had a neg. blood test. I'd had cramping that reminded me of implantation cramps with my 2nd child the night before the bloodwork (7 dpo). Yesterday AM I decided to try an OPK (I have like 10 of them left, and they'll need thrown away anyway)... line as dark if not darker than control line. Stayed there the whole day, but was a bit lighter depending on how diluted urine was. This AM did it again... Still as dark a test line (compared to yesterday AM). However, I took a HPT and if was BFN. I know I'm not ovulating... I have a lot of CM, but it's NOT fertile.
I've read contradicting things, that OPKs are more sensitive, but also that they are less sensitive than HPTs. Anyone ever gotten a dark + on an OPK, with a - on a HPT, and eventually the HPT turned +?