Thanks for your query.
After reading your post, it seems that you are having tonsillar stone in your right tonsills.
It seems that what appears to you as white pus is actually a tonsillar stone as it is white in colour and present as pain and swelling in the tonsills. It is usually accompanied by bad breath
It is advisable that you should get yourself examined by an ENT specialist
and get the stone removed.
Also have a throat swab culture to know the causative organism of infection, if any and the antibiotic appropiate for the infection.
Doing warm saline gargle will help in relief of pain. Take pain killers like Ibuprofen
twice a day after meals along with antacid Omeprazole
20 mg if the pain is severe.
All medicines should be taken after consultation with your ENT specialist.
I hope this is helpful to you.