Must agree with quiting before OCS. I smoked for several years - but quit a year or so before OCS. Stress levels went through the roof, shakes, didn't sleep well at night, realy bi***Y too. This lasted for 2 to 3 weeks. You don't need that kind of stuff while at OCS. It's difficult enough, you'll be stressed out enough, and you don't need the added trouble of snapping half way through and making everyone think you're an ass. They'll ride you till you quit or decide not to come back. Trust me, make it easier on yourself, drop it RIGHT NOW and be done with the worry.