My letrozole dosage got doubled this cycle. I start my opks on last day of meds because I am on early ovulater. I usualy get a + around cd9. When I start my opks on cd7 ( last day of meds) the line is usualy relatively dark and continues to darken until my positive, but they have never been this dark this early. Its almost + but not quite, I know. But  my question is, is this a faulse line maybe from the meds? Not taken with fmu or smu