unfortunately I cannot see your attached reports here. But got an idea that your TSH has been normal with your current dose of thyroxine
Well, your GP seems to be right in saying that the symptoms could not be that of hypothyroidism
. Just because you are getting symptoms mimicking those of hypothyroidism you feel that you need higher dose of thyroxine dose. but this is not true and in fact taking high dose of thyroxine than your body needs can cause hazardous problems including that of rapid osteoporosis
Having Hashimoto's thyroiditis
warns one to check sugars, Vit B 12 levels, Hemoglobin
, Serum cortisol at 8 AM and any problem in these tests will tell you if it has got something with your symptoms. Please get back to me with these reports and also FSH test and I can guide you further on these symptoms with possible remedies. Take care.