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is treatment for hypothyroid and neomercasole is for hyperthyroid. that means there is no use of taking both together.
high TRAb suggest grave's disease (hyperthyroid). but you have fluctuation in thyroid level. so it is sometime become hyper and sometime become hypo functioning.
one thing is that to take treatment for both at same time (thyronorm and neomercasole) is totally illogical and it is not benefitial at all but deranging the imbalance function of thyroid more.
consult any good homeopath
is the only science which can cure the thyroid disturbances permanently. you are on wrong way of treatment. change it to homeopathy.
medicine must be selected after taking detail history of your physical as well as mental makeup. Then n then you will get satisfactory result. So consult good classical homeopath. You will surely get benefit with homeopathy.