Rapid Mood fluctuation. Be clear upon!

Hello, My name is Arijeet and I have some queries which i wanted to be clear upon regarding the health of my wife. For the last few days she is having headaches towards the evening especially after 5:00pm. She usually has her lunch around 1:00pm in the office but is not able to have any meal in between. Further, i have observed very rapid mood fluctuations in her during the last few days, as she is getting very angry and emotional, suddenly of even very small issues. Also, she is having a continuous cough for the last few days and that increases while she is doing work outs in gym. Couple of days back she was feeling uncomfortable in office and even puked. While we thought it was because of work load we consulted the local physician to check her pressure which was normal but her sugar was low and he asked her to take some glucose. Now i wanted to know that which doctor shall we consult for a cumulative guidance on the overall scenario.