Why not just get a biopsy? I agree with the others that waiting until June is simply unacceptable. Are you seeing a head & neck surgeon or ENT? A PET scan is a little premature at this point. The biopsy/pathology report is the gold standard diagnosis. It is a relatively painless and quick procedure.

Tonsils can grow back if they were not completely removed during childhood.

Also, many of us had NO pain. Tonsil cancers can be very stealthy and asymptomatic. They estimated that my tumor was 2 years old when they finally dx'd it.

Pain and swollen lymph nodes could indicate an infection or PTA (peri-tonsillar abcess). You could even have an impacted/infected wisdom tooth).