question: i am having medication for depression for 18 years,i am having clonazepam and amitriptylene,recently my doctor wanted to change my medication but it didn t suit me...now i am not able to adjust in my old dose.i feel rapid palpitations and cold body,feet,i had done ECG ,Echo and TMT 2 yrs. back all were normal,only i could not walk for long in TMT,i had fatigue..pls suggest if my heart is ok