Hey Rinna,
Looking at your diary and that video i also spot something like early stage rot in your bud.
Do your plant get exposed to cold weather and rain?
At the looks of the plant in total your leafs are nicely green and i don't see any burnt tips indicate that you have been overfeeding so that job has done right.
You have been feeding her regualarly but if she stays outside withouth a roof, your plant will get water from rain as well.
If that is the case, she can be overwaterd. leafs will get small and curly when she has waterlogging and rootrot.
Make sure you dry the soil a bit and if you can, let her stay at a spot where the rain can't go on the buds/leafs and pot.
Goodluck growing :)