To me your plant looks okay. I just saw a friend's similar plant and it is in much worse condition.
I agree with the suggestions, do not fertilize right now, and try to keep it warm. I always delay or not do fertilizing during the cold season, plants are slowing down naturally. Just resume it if you really need to during mid Spring and be mindful of watering during these cold months, plants are not consuming much with the colder temps and decreased natural light. I would also delay repotting if you really have to in mid Spring.
