I don't know what it is, but I do know it goes through growth stages, putting all of its energy into 1 part. It possibly looks like it was "pushed" into producing the last flowering and it's really tired. I read you can trick it into reblooming more than what's normal, but you have to watch it because the plant needs to rest. The merchant probably was doctoring it up because they sell when blooming more.
Perhaps someone has some tips on special care to help it focus on resting/recouperating. Most likely it's not gone yet! Hope this helps.