It's not a life or death situation, but you should contact your doctor today or tomorrow and get in to see them this week.
If you start getting any shortness of breath, or if the flutters start to get really strong or don't stop, I would head over to ER. That way you can be looked at right away. No waiting to see your doctor. But I think once your doc knows you're having this you'll get an appointment right away.
You'll be okay. Don't panic. Just tell your doctor, they'll guide you from there.