I mean it's hard to tell in these situations but just stay calm and generally people who have a healthy cardiovascular system can survive amphetamine OD's that aren't too big. Like i said just stay close to your mom/family just in case something happens and be sure to stay hydrated and eat some good full meals.
You aren't out of the woods yet, vyvanse has a very long duration so you might feel another increase in stimulation in the next couple hours. Please be more careful with your doses next time, i'm sure this event scared you a little bit. Always research the drugs you take before you take them and find out how safe the drug is and only take the lowest medically recommended dose for your first time.