How long to Wait?

I spent the last week smoking every day, I'm 1 day into building tolerance again, the thing is, I've never smoked that much, and then had more for when tolerance is gone, typically I smoke til I'm dry. 2 days ago I smoked 6 bowl packs and it kept me high for 3 hours before I crashed on the couch half hour before the real down-high began. before then I smoked like 9 bowls with a friend and was high from 4:20 til like 7, same deal. I only have 2 bowls and i'm dry for a couple of days after, thing is, when I don't have weed(I'm sure this is common with many) i don't so much feel the urge to smoke(unless I'm on a stoner thread on 4chan but I've learned to avoid those unless I'm actually high), but when I have bud, and I have 2 bowls only, I crave like a motherfucker. that's why I'm asking, how long should I wait to get high.