I kind of agree with Miserylue. It really depends on how you feel when you're not high. If you're relatively happy, and you can find something to keep yourself occupied when not high, then you shouldn't really have any problems laying off weed for a few days. Heck, I do it on purpose every once in a while just to make sure my will power is still going strong, plus when you smoke after 3-4 days of being sober, it's that much more satisfying