28 male have pacs 2-3 times a week that i feel cardio and primary dr says nothing to worry about internet says could turn into afib should i worry?

Correct. PACs are a: potential precursor of atrial fibrillation, though in the short term primarily due to conflicting autonomic orders from mind/brain→heart. A far more relevant driver of atrial fibrillation is: https://www.google.com/#q=atrial+fibrosis, a result of long-standing CVDs (though in only early stages of recognition by medical testing via MRIs before autopsy). Study my many answers on artery Disease.