I had a TT on Dec. 17, 2010. My endo saud no thyroid meds until after the RAI treatment. I had my RAI scan on February 7, 2011, The total body scan was on Feb. 11. It showed uptake in the thyroid bed area, I started Levothyroxine on the 11th of Feb. My recent blood tests still showed that my TSH levels are still high. My endo increased my meds. All other levels were OK. I just started to notice in the past 2 weeks a lump on my collarbone. In fact, I have 2 lumps. There are very hard. One is larger that the other, I read online that you can have lymph nodes on your collar bone. Is this something to worry about? I am scheduled for a ultrasound lymph mapping in August.