@rjake12003, I can imagine how you are concerned after hearing the words "I want to rule out cancer." It's a good thing that the ENT noticed the enlarged tonsil and is investigating further.

Here's an excerpt from this helpful article: https://www.healthline.com/health/swollen-tonsils#what-causes-one-swollen-tonsil
What causes one swollen tonsil?
"If you’ve noticed only one seemingly swollen tonsil on your child (or yourself), it could be a peritonsillar abscess. A peritonsillar abscess forms at the back of the mouth and manifests as a pus-filled tissue next to one tonsil. These abscesses are typically a complication of tonsillitis and tend to be rare because tonsillitis is usually treated before the abscess can form.
One swollen tonsil may also be a sign of tonsil cancer, although other symptoms usually show up along with it, like a chronic sore throat and enlarged lymph nodes."

You don't have other symptoms that suggest cancer, but that does need to be ruled out. Swollen tonsils and lymph nodes can also be a result of infection. Since you recently also had COVID, your symptoms could be related to that. Don't beat yourself up for waiting for 4 months to follow-up. You're taking care of your health now and getting the attention this deserves.

When is the biopsy?