It sounds like she is just obsessed with work right now. There must be alot of drama there for her to be letting it spill over into her downtime. She's caught up in it and not realizing that it's affecting her relationship with you.
I agree with Krondragon about not pushing her though. Instead of trying to communicate with her over the phone, why not just take her out where you can get her full attention? Maybe you two just need more face time, literally.
“Inside every cynical person, there is a disappointed idealist”--George Carlin