HELP LADIES

Ladies,

Do FRER ever have evaporated lines or shadow lines??!? I took this with FMU and within the time frame saw the below photos! I am 16 days post trigger shot (I have PCOS and have been cycling through letrozole(femara). I’ve been peeing on sticks like crazy. Finally I did a FRER. Can someone share if I’m losing my mind and seeing a line or if perhaps these pink dye tests show a shadow line of sorts?? Thank you. Husband and I have been trying for 2 years and I’ve been praying hard! If you could help it would be appreciated! Or if you have one of those inversion filter apps where you could tell me if there’s one there?