I've made the pistils turn red from leaf-rub / fans too high / plants too close, and other unknown reasons that weren't pollination.
If you discarded a mild herm at 9 days, you probably wont have many seeds. Water spray makes any leftover pollen non-viable. Trying to tweezer out the pollen sacs will drive you "bananas" you wont get them all.
Get a green-headlamp for doing work during the night cycle. Some cultivars are insanely sensitive to the slightest light-leak.
...I'd continue to power through with the experiment at this point, if it were me. Good-luck buddy