Just jumped over from the heart disease community and Alex is correct, ectopic beats are almost always normal. The only time they are a problem is in people with underlying heart disease. Women your age are very low risk for heart disease in addition if you did have some underlying condition you would also have other symptoms such as shortness of death, low exercise tolerance, chest pain and fatigue.
Your Holter will only show you what you already have been told, I'm sure you're fine. A normal EKG or multiple EKGs is very reassuring so try to relax, anxiety will only make it worse.
Let me know if I can help,
Jon
beth,
try to relax, you're young and the doctors are right. You'll see that once you get back your holter results you'll feel a lot better.
as my cardiologist has explained to me, ectopic beats are normal, particularly for a young woman.
you're fine, try not to obsess about this, i know it's easier said than done, but stay positive.
keep us posted.