Is it heart problem or something else?

Hi doctors, In my work from home scenario, i experienced some heart palpitations episodes (4-5 times) with mild giddiness but i can move and walk during that time. (No other symptoms are there) After that, for safety purpose i did twice all heart tests like ecg, echo, tmt, chest xray and blood test which  normal. Only BP and LDL are high. Around 140+ Before work from i never experienced like that. For last 6-7 months there is no palpitation happened but i have the following symptoms. 1) occasionally pin point mild pain in left chest for few seconds and disappeared (even baby can tolerance that pain) 2) left chest fluttering/pounding for few seconds (sometime other body parts also) 3) feel like giddiness, lightheaded and feel like floating (not everytime) My question, is that any heart related problem or something other else? Other means, what is my problem and what should i do.. i really need to stop these symptoms. I am in worry, something might going to happen to me?😥😥😥