Fear of heart attack. For my issues?

Hi Doctors, Almost for a last 1 year, i am living with fear of heart attack. During these period i have palpitation 4-5 times, i did 2 ecg, 2 echo, 2 chest xray and 1 tmt (8 mnth ago) everything was normal. No diabetics No thyroid Non smoker and non drinker No family history but BP 140+ LdL 140 (total cholesterol 192) Being overweight Doctors said, you have nothing to worry, only focus on control BP and LdL. Since all heart testing were normal, I still have fear of heart. My symptoms: Feel like sinking and floating Feeling wobble and fatigue during walking and sometime in even at rest Only worry in daily life and there is no excitement and enjoyment These feels only occurred during evening time to till sleep Can't do daily activities Please advise what is my problem? Do i need any other test? What should i do next? What may be the reason for my issues?