I hear ya man. Day 3 of sobriety for me, and it sucks. I've quit cold turkey a few times before to pass piss tests for jobs, and it never gets easier. I've been burning multiple times daily for the better part of 12yrs now (damn, crazy to write that), but most symptoms subside around the 5th or 6th day for me. Nausea, anxiousness, loss of appetite, and the inability to fall/stay asleep are the hardest parts. My best advice is to work-out like a madman; do a shitload of cardio (biking, running, swimming), pushups, pull-ups, planks, squats, lunges, and finish off with a nice long session in a steam room or sauna. If you hit it hard enough, sheer physical exhaustion is usually enough to overcome the withdrawal, at least well enough to eat something and get some sleep.
On the positive side, your dreams are gonna get fucking crazy too. I'm talking unbelievably vivid, epic adventures that are so intense that you wake up still feeling the emotions you had while dreaming. Sometimes I become aware that I'm dreaming in the middle of it, and can kinda control whats going on; trippy shit. Dreams can be way more fun than recreational drugs, so at least you have that to look forward to.
Getting high is awesome, but getting sober can be rewarding too. The key with substances is to always be in control; don't let a substance control you. Good luck!