Student or Learner
According to the dictionary's definition, "pull oneself together" is to gain control of emotions, but can you also use "it" instead of "yourself" just to mean the situation?
ex)....Her misery was only compounded by her frustration at herself for not being able to "pull it together" and stop crying all the time...
They are originally the same.
"Get it together" might be used if someone is really getting into a mess with something, being very disorganised.
"Pull yourself together" is more likely to be heard if someone is panicking or really upset about something. It's one of those phrases that goes with potentially a slap round the face to get someone to stop crying!
I changed my mind. You are right.