I have never smoked more than half a bowl at a time. It doesn't make me feel high or give me a headache, but it does make me a little sleepy so I smoke it at night sometimes when I need to go to sleep but don't feel like wasting a good high. (and I blow it in my cats face, she loves that!)
I also smoke it when I am trying to cut back on ganja. I think I am more addicted to my bong than I am weed. lol I cannot go long without smoking something out of it.

I also smoke cloves when trying to cut back on consumption.

I think quitting for a while to get a job is fucking awesome, you stay strong. The dreaded drug test is an excuse I've heard too many times as a reason not to try to get a job or advance in life. Once you get the job and get in the groove, that big fat celebratory blunt is going to taste so good dude. (plus you can afford better weed)
luck to you!