Overdose or underdose

Hi gang,

24 M, recently got diagnosed with combination ADHD and got prescribed Vyvanse 30mg. First day felt like I was on MDMA and had an awful crash/comedown that night, next two days were much better full of energy ect.

But day 4, 5 and 6 I have felt super flat and like a zombie. No emotions/tired/brain fog and getting distracted and zoned out constantly. I called a few pharmacist and some said my dose was too high and other said my dose was too low. Before I book in to see my psych and drop $500 on an appointment, has anyone else experienced the same? And do you think my dose is too high or low? I trust my adhd brethren more than pharmacists atp because they all told me different things!

(Also my protein intake and fluid intake is great so that’s defs not the culprit! Plus my sleep routine has been decently okay with no crash for the past few days)

Any advice or insight would be greatly appreciated!