If the TMJ problem is not causing you any discomfort at present, then it doesn't need any active treatment. Just avoid opening jaw too wide and chewing on hard, sticky or chewy food. Take an anti-inflammatory tablet when it flares up.
For the throat pain and itching it does sound like an infection with maybe an allergic component. Please take an antiallergic like Montek LC once at night for a week to 10 days. If it persists, then please meet with your doctor or set up an online consultation.
Next Steps
steam inhalation twice a day
Salt water gargles after meals
Health Tips
avoid using ear buds/ headphones for a prolonged duration.
Avoid cold and sour food.
Keep sipping on warn water throughout the day.