Diet changes can definitely wreak havoc with your system. The jet lag can cause appetite changes as well as fatigue (your body clock is off from its normal routine).
If you have allergies and respiratory problems, the smog would not be good for you and it would be advisable to spend as little time outside as possible.
Light-headedness could be a sign of dehydration. Are you getting enough non-alcoholic and non-carbonated fluids? The newly recommended amount is one-half of your body weight in ounces per day.
Try upping your fluid intake as that may also help with the congestion (you need plenty of fluid in your body to rid yourself of allergens and mucus).
Hope you feel better soon!
Lindaru
Linear Mode
