Do I have a problem?

Looks like a magnesium deficiency. I would check your substrate pH, making sure the water you feed is at room temperature 18-21'C. Same as you substrate as this will affect how the plant absorbs nutrients and oxygen. Add a little epsom salts, tsp/gal of water. This will add some magnesium and sulphur. See how she responds, good luck

It's possible due to needing a bit more N when it was in veg stage and transitioning into flower. I would be tempted to carry on as you are now though, plant should still make it to harvest. Good luck

Hey 👋, I think at one point you overdosed the girls, you see the edge or tip of the leaves are burned, maybe by one overdose its blocking another nutrient that normally happens, so maybe try a quick flush and after that start again your feeding normally with some micronutriemts and a typical bloom nutrient, remive these affected leaves. Also be sure to have a stable ph, thats something else i can think of