I just woke up feeling right side of throat...

What does you complain suggest ?
it suggests lymph node infection in the neck
What is the treatment for infected lymph nodes?
Take an antibiotic AMOXICILLIN + CLAVULONIC ACID 500mg once every 8 hours for a week and wait for another week after that.
Surgically removing the gland if necessary and in the event that it puts pressure on neighboring organs, causing shortness of breath and yawning, as I mentioned
 
What are the most common causes of an enlarged lymph node?
    Bacterial infection
    viral infection
    cyst
    infection in some place that drain to them like oral cavity
What are the checks that need to be done?
    Ultrasound image of the gland
    CBC