Had My Tonsils Removed 6days Ago And Yesterday Evening I

Had my tonsils removed 6days ago and yesterday evening I noticed quite a large clear looking bubble type thing where my left tonsil was. I'm only getting pain in my lefts side including constant pain as well as horrible pain when swallowing even water, ear ache and neck pain on the left side. The taste is horrible and mouth is producing a lot of saliva. I'm unable to eat properly now, I was eating better for the 3 days after the operation and was able to eat a lot more food compared to now which is nothing. I'm worried what this bubble type thing is and what I need to do and what has caused it? Any help will be appreciated.
Thank you