After 2 weeks you should be OK, depending on how much you used to smoke. I've smoked everyday for about 7 months and I know if I took a 2 week break it'd lower it almost completely. You should smoke now and see how you feel, really. I mean smoking one bowl in a break isn't gonna stop your tolerance from lowering. Also if you don't mind working out, do that too. Go on runs and stuff, heard that helps a lot as well.