I just wanted to add what I think happened, but this is pure opinion. I think that when you switched her light and up potted her in the same day it was just a tad too much stress for her. I tend to try and do one or the other in one day. Try to switch her light and let her acclimate to it for a few days then pot up or vice versa. Whatever floats your boat. Situations can help determine the order aldo. Like is she is starting to become root bound obviously potting up would be done first. I try and take it slow with everything that can stress the girls like nutes, training, potting, lights, etc...we have all moved a little to fast for our plants but that is also how we learn to know our plants wants and needs because no two girls are alike. She looks great just keep doing what you have been just be cautious of moving to quick. Rome wasn't built in a day and neither are dank ass buds. Best of luck friend!