Is this normal or not?

I took a high dose of vyvanse today so that I could pass my final (stupid idea btw...), now I'm experiencing visual and auditory disturbances and I'm very paranoid. I was just wondering, is this considered amphetamine psychosis? Or am I just being paranoid haha...and the disturbances are bad (eg I'm seeing shadows/demons in the corner of my eyes, hearing footsteps, etc). Or am I just experiencing overdose symptoms? (btw I'm prescribed vyvanse for ADHD, so I'm not breaking the law lol)...