Have you got carpal tunnel syndrome? This is characteristically common in pregnancy so is hormone related. Most usual sign is of tingling in the fingers and at night, the patient finds hanging the hands over the edge of the bed helps.
Unless you go to the Hospital you won't find out what is wrong. Can you take someone with you? What does your daughter know about these tests, dye is rarely swallowed

…… that's a barium meal ! and totally un-related to CTSyndrome. Dyes are injected for various conditions for diagnostic purposes usually when one requires an X-ray.
Give the Dept a ring and ask what the tests are likely to be and how long it will last.