The idea is to get your TSH under 2, your GP needs a fat smack, surely someone else can take you seriously. Chances are you also have thyroid antibodies, they seldom test for those, but it is important to treat your problem with Eltroxin or whatever your Dr prescribes for thyroid. Sometimes ones body doesnt convert the T4 into T3 either, so whilst you may be on Eltroxin you may still feel blergh, then they often prescribe Diotroxin, but am sure that on Eltroxin alone you will feel so much better, could you not be referred to an Endo? The labs have such wide ranges for what is normal, you need to go by your symptoms and clearly you are not doing well and need treatment.