I also have some of the hypothyroidism symptoms listed in wikipedia
such as weight gain, depression, anxiety
, fatigue, sleepiness, cold intolerance. My doctor thinks I have Hashimoto's Disease. She suggested that I start taking levothyroxine (25mcg). I've bought Euthyrox, one of the two brands available in my country. My reaction to it was quite bad, I had very severe headaches. I usually use ibuprofen for my headaches so I tried it first. It couldn't help at all.