you need to start feeding your plant, she needs food and is starting to show signs, also make sure you check your ph, your starting to get adverse reactions of not feeding and not having your ph correct. if i was you i would start my feed. she is old enough right now to start feeding. i am sure once you start feeding and having the ph in check you will see some real nice growth.
just remember feed less than what the label or directions want you to. a little goes a long way.