Is the line getting darker? 
DPO: n/a ; FMU: Yes; CD: 33
DPO: n/a ; FMU: n/a ; CD: n/a
DPO: n/a ; FMU: n/a ; CD: n/a
DPO: 14; FMU: Yes; CD: 30
DPO: 8; FMU: n/a ; CD: 22
Very faint 
DPO: 7; FMU: Yes; CD: n/a
10dpo can see faint pink line. 
DPO: 10; FMU: No; CD: 34