Hyperventilation, Numbness, Body Shaking, Morning Vomiting, Nausea?

My boyfriend has been sick for over a week now with the above symptoms. It has gotten to where he only eats once a day due to nausea and loss of appetite and fear of throwing up. He went to the ER and they said he had deficiencies of calcium and phosphorus. Also, they said something about hyperventilation syndrome? I'm really worried. Does anyone have any idea what could be causing all of this? Or how to fix it? Please help I'm very worried. I've prayed a lot and his grandmother said he was feeling better today. Hisblood workk came back all clear (they took 10vialss!). Thank you Lord for his progress.