First follow up found inflammation

I had a partial Glossectomy with a free flap along with neck dissection January 3, 2025. After the surgery they told me since they didn't remove as much as they wanted that radiation would help. I had 30 rounds of radiation and finished end of April. I had my first follow up with my cancer team yesterday( it was suppose to be june but I had to reschedule). They found what they say is inflammation right where my free flap and old tongue meet. They prescribed me meds to hopefully eliminate this but if not ill need another biopsy. Im freaking out because radiation wad absolutely horrible, lost my sense of taste, lost all my facial hair and had horrible ulcers in my mouth and it if I did it all for it to just come back this quick? Im hoping someone can give me some insight and information about this.

Ill add that i had no risk factors, I dont smoke, drink and I'm only 33 years old, they said it might be genetic.