hawke+doctor
I'm not entirely sure I can even help unless she lets me look at her more closely, but my magic wouldn't meddle with anything in her mind. Or it shouldn't, anyway. I'd have to see if regular healing magic has any effect on her first before I go calling a spirit.
I was able to cure Cosima's terminal illness months ago, but it's possible that was just a fluke. Ideally, spirit magic will heal her soul, assuming people from your reality are compatible with that kind of magic. If I can accomplish that without contacting an actual spirit, then all the better.