Worrying even after tests are normal.?

Hi doctors, 1 yr ago, i got heart palpitation so, I did 2 ecg, 2 echo, 2 chest xray and 1 tmt (8 months ago) all were normal. All my blood test reports are normal. Only my BP and LDL are high. I am obese, no family history, non smoker and non alcoholic. Working in IT field for past 10 years, but in work from home (last 2 yrs)  i faced all these health problems. Doctor advised me, your absolutely normal.. only focusing on control your BP and LDL. But i can't convenience. Even all report are normal i still worrying about my heart. 1)A fluttering feel in left chest (sometimes others body parts also) 2) A needed pricking sensation in left chest which disappeared in seconds 3) Floating feel during walking 4) Got fatigue without doing nothing 5) A sudden and flash sensation in chest, stomach and upper back which happened in less than second. Above sensations are make me fear more about my heart. Please doctors kindly advice me on the above issues. What should i do now..?