Day 4 of stims, finished letrozole (5 days) yesterday. Spotting for the last 24 hours

Does anyone have anything positive or even neutral that came after light pink spotting?

This feels a bit weird and I am concerned.

Mid-luteal - 2mg estradiol for 10 days C2 - 5 right, 4 left, E2 119 CD3 - 5 mg Letrozole (5 days) CD5 - added Gonalf 225 IU CD7 - E2 11, 5 right, 3 left, last dose Letrozole, increase GonalF to 300, light pink spotting in PM (after peeing) CD8 (TODAY) - GonalF 300 again, light pink spotting (after peeing) once in AM and twice in PM

No cramping, feel like things are quiet, which they should be on Letrozole. I am very weirded out by the spotting and starting to spiral here.

Age 39.5, Amh 0.15, banked one euploid last cycle on same protocol but only 2.5mg Letrozole. We didn’t reach my right ovary due to an early lead so my doctor is doing stronger suppression.

Does anyone know if this spotting is a huge red flag?