Have you had your thyroid tested? That was the first thing I got done when I started getting panic attacks. I just had it tested again recently because my doc said it may be causing an increase in palps if my levels are off. I'm not sure if birth control can affect you, but it does change your hormones to make you unable to get pregnant so who knows.

You could just be having an increase in anxiety and the extra adrenaline is making your vagus extra grouchy. I will say one thing, I rarley get palps when I'm on edge or nervous. It's almost ALWAYS when I'm relaxing. So say I'm anxious all day, my palps don't hit me until the evening. Not sure why that is, it just is. Main reason I've stayed away from beta blockers, I feel they would give me more palps since mine occur at a slow heart rate and not at a fast. Everyone is different however.