Olivia likely called the WH after Jake left. The only reason she likely went to the WH is because of what Charlotte told her when she called. I don’t think she would have made that move if nothing had changed on Fitz’s part. Olivia’s true self has always wanted Fitz. That really hasn’t been at question since season 2 (though other obstacles have). Her wanting is not the problem; it’s the claiming. She’s an only child and she does not want to share. Fitz ‘s unadulterated audacity (pun intended) allowed Olivia to be brave and go get her Fitz doll man.