How long does the anhedonia last?

I quit Monday (technically Sunday around 1pm) this week. I know that WD symptoms will last a while (100mg/day for about 6mo). The lack of motivation or interest in anything or doing anything is killing me. Im trying other things to help, but nothing hits like it used to. Adderall isnt doing what it used to, my new Focalin script isnt either. Hoping this goes away soon as it makes school damn near impossible. How long did it last for you?