I Am A 30 Year Old Female Who Has Palpitations

I am a 30 year old female who has
Palpitations with sob and dizziness. When palpitations stop I usually vomit. I don't feel overly anxious and this all occurs at rest or normal activity. I've had negative stress test . Normal Echo , 30 day holter showed pvcs and pacs buy cardiologist says this shouldn't cause my symptoms---even tho this was occurring when I pressed the it ton on the monitor. I am scheduled to see an ep doc next week but I'm so scared and feel like the doc is discounting everything I say because "oh you're 30". They put me on a low
Dose beta blocker but it's not helping.