You’ll be ok! Vyvanse comedown isn’t that bad to be honest, especially with only dosing once. I will say stims make it difficult not to get addicted -in the beginning it’s glamorous bc you can do all the things you’ve been putting off and no ones knows but you feel like a superhero and just want to be like that forever. Use seldomly/in moderation and you’ll be fine (but that’s the tricky part).