Constipation?

[Lernermichelle]

Hi. Lucy, who had loose stools for a few months until putting her on raw, now has not moved her bowels for 3 days.  I am not sure if it is constipation or not. She had a vomiting episode on Sunday and Monday morning, and on Sunday and Monday had two very very long solid bowel movements.  I fasted her for 24 hours until Tuesday morning, and I think she had a normal size solid bowel movement Tuesday morning.  After that I fed her plain cooked turkey for 2 days and then went back to her raw diet with the supplement mix yesterday.  She has not had another bowel since Tuesday. I gave her some slippery elm this morning in case it is constipation, but I am wondering if maybe the two very large bowel movements before her fast possibly cleaned out her intestinal tract, she then did not eat for 24 hours, and has eaten very digestible food since then-- so is it possible that she is not constipated but just has not formed a bowel movement yet since Tuesday? How worried should I be? She is eating, and until last night was eating pretty voraciously. This morning she needed a little coaxing but did eat her whole breakfast.  She just hissed at me for the first time ever about 10 minutes ago, but she had just had a fight with one of the other cats-- earlier today she was her usual affectionate self.   Thanks for any thoughts, Michelle