Very frequent ectopics. Help me out.

Hi..i am having palpitations from last year. So i gone through few tests like holter and echo,ECG..evrything was fine..then i was on beta blocker 5mg medication since last year and i gradually decreased dose..now iam taking 1.25 concor alternative days. But the thing is from last 15 days i was experiencing so many palpitations then i went to cardiologist and he done echo,ECG ,holter. All are fine..holter it's showing 0.18 percentage of ventricular ectopics.he said it's fine but still iam going lot more ectopic beats..agian i had 12 led ECG done few hours back and it's showing normal..and i had blood tests done..i am having calicum deficiency of value 8.2 . But still my ectopic beats irritating so much It's bothers me alot and ruined my quality of life..iam feeling so depressed.. please help me out.