According to recent guidelines by Government of India, you need to go for a chest x-ray.

Pan D once a day for a week, before breakfast. Looks like acid reflux. If it was laryngitis, the voice would change first.

This seems like a strep throat . You would need Medicines and some home remedies as well. Let me help u with home remedies . Talk less. Give rest to throat.Avoid Hotel Food, Avoid Fast food,Hamburgers, Pizza.Do not take any COLD drinks , cold water, ice cream, chilled food from refrigerator. Take warm or hot drinks often – hot tea , hot coffee,hot Soups, hot milk. Avoid Fried/Oily foods like –Samosa, Dosa, Pakora, Papad, Namkeens, Potato Chips , Namkeens . Take soft foods like rice Gurrel (Khichdi), Plain daal, boiled vegetables.Avoid Chillies completely. Take plain warm water, Cocunut water,  Enerzal in warm water.Avoid Cold Milk , Meat Products ,Fried rice and noodles. Avoid Sour fruits like Citrus fruits, grapes  . Avoid heavy meals, eat small frequent meals. Avoid Alcoholic drinks of all kinds  like Beer, Wine,whisky,vodka etc.Warm saline gargles thrice daily. Steam inhalation thrice daily.Rest for 5 days Private Consult with me for proper medicine protocol if the above doesnt help.If no relief, get the following Tests needed - CBC , ESR , AEC , SERUM IGE