Sir i got tested for free thyroid recently and find out that my tsh is normal 1.770, my ft3 is also normal 2.89, but my ft4 is low that is 0.91 whereas normal range is 1.00-1.70 , does it shows euthyroid sick syndrome(non thyroid illness syndrome) because since last one month i am facing muscle pain all over the body, low body temp, cold sensitivity, stomach upset used to go to toilet frequently and fatigued all the time. Tell me if it show euthyroid sick syndrome because a very few dr pay attention to this they just look at tsh and say its fine but i want to know this thi g in detail, tell me please sir