Pantheist, though I was raised Lutheran. I agree with 32yrslater as well, you need to be a free thinker. You can't follow what normal humans tell you.
Besides, weed is a plant, a natural thing and, if you believe in a god that created the world, then that means he created this plant as well. And if you don't feel like it's affecting your life negatively, then don't worry about it.