I Was Off My Thyroid Medication For A Few Weeks

I was off my thyroid medication for a few weeks back on now. around 1980 I had a goiter they gave me radioactive iodine then put me on levothyroxine 1.75 I am now on 1.50 been on for less than a week during the time I was off I developed a sore throat and a hoarse voice that still persists I believe from not having medicine my question is if so how long before I am stabilized at least in terms of my thyroid levels?