Why is she dropping a little was just looking perfectly fine!?

dial back fertilizer concentration a bit relative to how long it took to get that dark. possibly reduce or adjust light higher if the newest internodes are too short. internode length is your gude for light intensity. If this is occurring only after an irrigation, use more drainage amendment in future. Normal watering should never cause droop. if it does, it means the substrate was poorly constituted. in a high water capacity substrate, you want ~50% perlite or similar - i'd suggest vermiculite #3 over perlite any day... in something like coco that holds less water, you only need 33% of volume drainage amendment(s). Adding enough makes overwatering virtually impossible, unless you don't wait long enough between irrigations.

Nitrogen toxicity...........you are feeding too much or too often.............or both. If you continue doing the same as you currently are, you will end up damaging the plant.

did you just water it? this is common when watering and the medium holds onto a bit to much.