For the last few days I've been getting faint lines on One Steps, but Clearblues are stark negative. I know Clearblues are awful, but I'm not even getting an evap line on them. I honestly can't see how I've been given 3 false positives in a row on the strip tests. I'm 12dpo confirmed ovulation via OPKs and I'm on cd41. Period was due yesterday/today, but as my cycles range from 17-39 days it's hard to tell when I'm due. What am I doing wrong? I dip my tests and read them within the timeline. I'm done with being heartbroken every month from false lines