Low Sodium / Weird behaviour. Stress.

This is for my aunty. Her age 65. Since 2 days, a weird situation occurred. She is not talking to anyone. Neither eating. Water intake also by force by her family members. She even do not recognize the family members too. Before 2 days, she had ometing after lunch and then this problem started. Subsequently, my uncle took her to the MD doctor in our area and performed couple of tests. I do not have specific details about tests but as per my uncle, all tests normal but for one test, the sodium level is low. In addition, she is facing issue of Vat too. (I don't know it's english word). Her BP and sugar is normal. The doctor to whom they visited is not available neither responding on mobile too. Kindly advise what should we do for my aunty. We are staying in mulund, east, mumbai. Which doctor or hospital we should take her for additional check ups. Is there anything we can do at home. All family is under tremendous stress.