Albert, I suggest you contact your doctor.
Many people have soreness in the neck/throat very soon after RAI, from the inflammation resulting from radiation damage to the thyroid. I’ve never heard of this starting two months later (which doesn’t mean it can’t happen). Please let your doctor decide whether this is of concern, and let us know what you find out.
Best wishes,
Dianne W
NGDF Asst. Online Facilitator