FinnMaid

Hello Welcome to Thyroid Board
TSH ie. thyroid stimulating hormone is supposed to do just that - make your thyroid work. When your thyroid is failing the pituitary gland releases more TSH to make it work but with little success. When you're looking for reliable sources you can pretty much trust what The Endocrine Society says or what's published on PubMed or by thyroid associations (there's one in the UK too, although their guidelines regarding the treatment of hypoT have taken a step back so those I do not recommend to be taken as the "ultimate truth"). Those sites that promise "natural healing" from thyroid autoimmunity I wouldn't trust or those who state that anything within reference is ok or that TSH is the only guideline. There is no black and white in "thyroid world" so keeping an open mind is good, not everything works for everybody and you'll have to decide what the best course of action is for You.

After a couple of months on this dose you'll know what it does for you, it's quite possible you'll need a higher dose (but no way of knowing before giving it a try). Take your med on an empty stomach with plain water hours away from other meds, calcium and iron supplements. Aim to have your TSH below 2 and your FT4 above midrange, in a place where You have no symptoms. Low TSH is ok as long as your freeTs are within range and you don't have any hyperT symptoms.

Your goiter may shrink when on thyroid medication but for your med to be succesful you'll need to have a low TSH (pushing your thyroid to work may have caused the goiter in the first place).