> I still experience ectopic heartbeat now (although much less frequently) as a result of the vaccine 6 months later.

Are you confident that this is related to getting vaccinated?

I also got irregular heartbeats a couple of years ago (long before I got vaccinated against Covid), mine are called premature heart beats (https://en.wikipedia.org/wiki/Premature_heart_beat) and they're harmless as long as they stay under a certain of times per minute, according to my cardiologist (after extensive tests).