I think it's time you got your GP to check your Thyroid function. Kris's Thyroid had failed by the 12 month mark. He takes Levothyroxin tablets as a replacement. We did need to adjust the dose in the first year he took them. I did blood tests every 3 months. As we need to keep a close eye also on his Calcium levels ( his Parathyroids also don't work), I continue to check Thyroid function 3 monthly.
From being tired and very cold, Kris now has plenty of energy and feels hot again.
Get thee to your GP,
Tammy

Caregiver/advocate to Husband Kris age 59@ diagnosis
DX Dec '10 SCC BOT T4aN2bM0 HPV+ve.Cisplatin x3 35 IMRT.
PET 6/11 clear.
R) level 2-4 neck dissection 8/1/11 to remove residual node - necrotic with NED
Feb '12 Ca back.. 3/8/12 total glossectomy/laryngectomy/bilat neck dissection/partial pharyngectomy etc. clear margins. All nodes negative for disease. PEG in.
March 2017 - 5 years disease free. Woohoo!