Long rounds of bigeminy when trying to sleep

I, 20y/o male, have been dealing with bigeminy attacks specifically when lying down for bed. I rarely get pvcs during the day time, unless i’m actively monitoring for one to happen, or i’m just feeling anxious. But during bed time, i always get pvc attacks, and lately it’s been super long rounds of bigeminy. These rounds will normally last anywhere from 40 minutes to 2 hours long! it drives me insane cuz i can’t sleep while they’re happening. I toss and turn trying to get into a position where they’ll go away but they always persist. I’ve had full cardiac work done and everything says my heart is perfectly healthy. I take magnesium everyday twice a day (morning and night). I’d say i have a fairly healthy diet, i do consume energy drinks to help with my POTS, but i HIGHLY doubt it to be the cause considering i still retained this night time bigeminy even when i was caffeine free. Does anyone else experience this? Any coping methods or supplement recommendations is welcomed!