Brief Answer:
not to worry, follow the advice, observe how you stay thereafter...

Detailed Answer:
Hello and Welcome to 'Ask A Doctor' service...
I've gone through your query in details...
I can understand your concerns...

These symptoms are likely to be due to the body's acclimatization which is typically seen during the fall-seasons as well as winter...

To overcome this, I'd suggest not to remain on an empty stomach for more than 2-2.5hrs, always keep having some small portion of light meals...avoid going to any overcrowded places, for the time being, perhaps use a face mask while going out...

-Take some steam inhalation twice to thrice daily, it'll help to reduce the associated symptoms...

-Please drink a lot of fluids. Have plenty of warm liquids (soups, broth, porridge etc.), they'll act as an immunity booster and fasten the recovery.

-Avoid any form of cold-drinks, sour foods, smoking (if at all do) as they can further aggravate this situation...

Just follow all these and observe how you stay thereafter...

Wish you good health...
Let me know if I can assist you further...

Take Care
Kind Regards

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