Who is likely to have the most in-depth knowledge regarding a wide number of medications with which a patient might come into contact? a physician specializing in a certain type of medicine
a pediatric nurse
a hospital pharmacist
the pharmaceutical sales person

just be there for her.

explanation:

not necessarily literally but figuratively. also don't say things like "i understand how you feel", because even though you are trying to , you clearly don't understand how she feels (i'm gonna go out on a limb here and assume you've never had a heart attack). also just let her rest. that is one of the best things for you to do.