My mother had been feeling tired and lethargic, along with Diarrhea for 2 days. Her Blood Sugar is around 113-120 after meal. Here BP, multiple readings is fluctuating between 77/56, 83/57, and 91/53. Pulse between 73-83. She doesn't feel tired now but still has mild Diarrhea and no significant rise in BP, even after increase in salt. I am worried. What tests would be needed for further treatment with a doctor?