Hi, dear
I have gone through your question.
I can understand your concern.
You have weight gain, hair loss,
tiredness,
cold intolerance and other symptoms. Your all symptoms suggest
hypothyroidism but your blood tests are normal.
In my opinion you should check your Free T3, free T4 and TSH. If needed check for anti too
antibodies. These will give you exact diagnosis. Then start treatment accordingly.
Don't worry about small lumps under arm. It may be enlarged lymphnode due to
reactive hyperplasia and it will cure within few days. If your lymphnode remains permanently enlarged then further investigations are needed. Consult your doctor and plan accordingly.
Hope I have answered your question.
If you have any doubts then feel free to ask me. I will be happy to answer.
Thanks for using health care magic. Wish you very good health.