Hi Biwek, Welcome to HCM,
Looks like you are going through adolescent problems with anxiety
.The Tonic tablets you have taken will have helped you gain some stamina and energy. The Fluoxetinne Hydrochloride is prescribed for anxiety as well. Don't worry. You will get over these problems as you grow older.You must have your Thyroid
function test repeated in a year to see if there a problem exists.Have general body exercises and deep breathing when you get palpitations. Also an ECG is a good idea.