Some days i have 5-10 pvc's, somtimes i can go a few days without having them, is this a good sign that my pvc's are not dangerous or anyting to worry?

Yes: Pvc's occur in almost everybody, whether they are felt or not. 5-10 pvc's daily is not unusual and may coincide with caffeine, sleep deprivation, hypertension, male gender, age, or abnormal electrolyte levels (magnesium and potassium especially). Your primary physician should perform detailed history, physical and appropriate testing or referral to rule out rare, but dangerous causes of pvc's).