Exceso o deficiencia?

Personally, I think she needs a new pot and fresh medium. Hope you can fix her, good luck mate.

No, this can't be a chemical deficiency or overdose. Like BraveHeartGenetics said, the color would be different. Either you've given too much water or it is a light burn. Take care, hopefully you'll get through💪

looks a little droopy, I was going to say over watering, but BraveHeartGenetics beat me to it

Hi mate, with N toxicity you would normally see a lot darker and shinier leaves. I think the problem you have may be over watering and could have caused a lockout. You should let the soil completely dry before adding more water. She is a hardy plant and will bounce back in no time, you're doing great. I hope this helps, good luck and happy growing