Are you guys sleeping on vyvanse?

I had 30 mg and was legit staying awake for 48 hours so I stopped taking it. It's been a year. I gained 20 lbs being off the medication. I stopped bc i can't sleep on the medication but boy does it help with my adhd and binge eating. I'm thinking about asking my doctor to lower the dose in order to sleep? Good idea or should I stay on 30 and find a sleep aide.