hello and welcome to HCM,
You are most likely to be suffering from an acute episode of 
tonsillitis. You need to do the following as soon as possible:
1. Get an ENT consult and re-evaluate the effectiveness of the medication given by you doctor as you have pus coming out just the same
2. Request your doctor for a throat swab and send it for culture and sensitivity
3. Start anti reflux treatment also in consultation with your doctor
4. Take only warm fluids and do salt water gargle
5. Do not speak loudly or strain when you speak
5. Assess whether you need injections for faster and better symptom control
6. If the problem occurs frequently then may be you can consider removal of the tonsils at a later date.
take care and get well soon 
Dr Sriram Nathan