Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain
sore throat,
swollen lymph nodes, headache and phlegm formation can be due to bacterial or
viral pharyngitis and the bump over the roof of mouth and gum can be apthous ulcers or can be
abscess that is formed secondary to infection and inflammation..
As other symptoms have subsided you need not to worry and you can gargle with a numbing mouthwash to relieve pain..
Take anti-inflammatory painkillers like Motrin or Aleve..
Do warm saline gargles..
Avoid spicy and hard foods and take a
soft diet..
Sip on plenty of warm water..
Gargle with antiseptic mouthwash to prevent infection..
In case if there is no improvement in a week consult an Oral Physician and get evaluated..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..