I feel like I'm dying, but can't on Vyvanse. I tried it twice
I asked someone that takes it. Recreationally. It depends how much you took. He said it can go on for days. 2-3. It's very long acting (as you know already)
Don't re-dose. Wait for these effects to wear off. Or you'll keep extending it.
I felt like it was never going to end. But I felt all of the negative effects. Again, don't re-dose.