Comedown - sleeplessness after 12 hours?

[Paroxysm]

Swim doesn't have much tolerance at all towards amphetamines. He took maybe half a 54mg concerta maybe twice a week for a month for work, stopped for a about a month, and decided to take some right before work yesterday. Swim attempted to break the 54mg pill into half but it ended up more like 3/4 and a 1/4. Anyway, swim took the 3/4 pill about 1 hour before work (1:00pm'ish) and the 1/4 pill at about 2:45pm. He was feeling nice and speedy until around 7 or 8pm, just working like a dog.
Swim got off work at 10:30pm and smoked some ganja around 11:30pm and felt that real speedy effect comeover again. swim was playin some video games in his room and actually had to stop and try to calm down because his heart felt like it was beating 5 times a second and he felt kind of uncomfortable. After a while the speedy effects wore off and he smoked another bowl. Swim went to bed at around 2:30am but could not fall asleep and he could tell it was from the speed still.

Swim was wondering if this was normal to not fall asleep after almost 14 hours after dosing. He is also wondering if it was the ganja that kind of brought the effects back on? He was feelin almost back to normal before he smoked the bowl, then afterwards that speedy effect came back.