Thanks for your question on Health Care Magic.
I can understand your concern.
By your history and description, possibility of Upper
respiratory tract infection (URTI) is more.
URTI causes
sore throat which is giving pain in the neck.
It also causes cough and expectoration, this gives feeling of burning in the lungs.
So follow these steps for better symptomatic relief.
1. Drink plenty of fluids orally.
2. Avoid oily and spicy food. Avoid hard to chew food.
3. Avoid
stress and tension.
4. Do warm water gargles 5-6 times a day.
5. Start broad spectrum antibiotic like
levofloxacin or
azithromycin, antihistamines and anti inflammatory drugs.
Don't worry, you will be alright.
Hope I have solved your query.
Wish you good health. Thanks.