Your PH is off from what I can see with the lighting.
If in soil - get it to 6.2-6.4
If in coco or soilless mix - get it to 5.5 - 5.8
MEasure your run off to see what your ph is in the medium. IF its correct, treat for pests in the soil
Hey,
It’s hard to tell with the lighting, try taking pictures with flash.
From the looks of it, i think you might be feeding too heavy, and your ph might be out of wack in your medium
Most likely culprit is pH. This would explain her drinking less as well as the spots. Check the pH of the runoff, my guess would be that it's overly acidic.