Adrenal Disorders :: Addison's Disease - Connection With Irregular Periods

My daughter is 19. About 18 months ago she started having panic attacks, feeling nauseous and shaking and becoming quite distressed. After counselling and medication it became controlled. She still suffered episodes of shaking and feeling as if her blood sugar was dropping. She has had episodes of lightheadedness and passed out at work , being out for about 10 minutes. All her tests have shown as normal to now, however something is suddenly causing these events. She has had bp, eeg, fasting bloods- glucose and thyroid function, all normal. She is awaiting a 24 hour eeg now. I read about adrenaline crashes and Addison's disease recently and its connection with irregular periods, which she gets and Vitiligo, which she has a small patch of. Is it worth discussing tests with her GP? they seem quite happy to put her regular visits there down to anxiety though.