Thanks for your responses. Sounds interesting. Doc said basically not to avoid anything and just continue as normal until the next lot of blood tests reveal more.

I haven't noticed any rapid heart beats thankfully. My main problems have been more frequent bowel movements (around 2-4 a day instead of the standard 1 a day), skin sensitivity, insomnia at night even though I've been very lethargic during the day, jittery, loss of concentration, tired fatigued muscles - I thought initially that was just because I've increased my exercise level and been doing more weight exercise...it seems not.

It's really nice to have an answer though (well, the first part of the answer anyway).

The insomnia and a few other symptoms are a sign of grave's disease, normally graves disease is the reason you u get the hyperthyroidism, there is foods that will make you feel heaps worse, and heaps more tired, insomnia, your lucky they heart palpatations havent started, but the longer they leave you without meds the worse the TSH T4 & T3 will get, be on top of the doctors, and be careful of bread, as u have been diagnosed with hyperthyroidism, that means u are overactive, which means u have to much iodine... Bread has iodised salt in it, lots of foods do.... u need to avoid this ad it will make u feel really tired and really unwell. Ive actually stumped my thyroid doc, he has actually learnt from me, and had never told me half the stuff he should tell all his patients, docs never tell u the full story