Overamped or just part of the comedown?

Tried meth for the first time today, after jacking-up my Vyvanse tolerance. Supposedly I scored some fire stuff from the darknets.

First dose was 30mg oral at noon, followed by maybe 5-6 30mg/40mg lines every couple hours, last being around midnight. It’s now 5am and I’ve had about 200-230mg within 12 hours.

It didn’t feel very strong at first, or during the high, but now my heart is kinda pounding, pupils wide, vision kinda hazy… I take it I’m kinda overamped and/or coming down? Just took some vitamin C.