Your description indicates possible symptoms of anxiety and depression. However unless she is seen in-person and assessed to rule out any underlying medical problems and determine the nature of problems, medicine cannot to advised.
Next Steps
reassure her and tell her that she needs to see a Doctor for some tests. Try not be be judgemental and keep appreciating her perceptions with empathy. If indeed she is diagnosed with depression or anxiety, then appropriate medical and psychological treatment would be advised. These conditions are very much treatable. best wishes