How is an irregular heartbeat different to pvcs? zolpidem warns about irregular heartbeat and i have been getting a lot more pvcs (normal echo )

Go see your doctor: I'm glad that you had a normal echo but that only tells us about your anatomy, not about your electrical signaling or rhythm. For that, you need a 24 hour holter monitor if you get your pvcs daily or an event monitor if you get them every now & then. Atrial fibrillation is due to abnormal pacemaker leading to pulse speeding up & slowing down on its own, different from occasional skipped beat (pvc).