I definitely grew up in a strongly anti-drugs environment, and the whole "say no to drugs" bit has yet to be erased from my subconscious. Hence, it pops up sometimes.

I also understand where you're coming from, also in the feeling that life is one big trip. You just have to slow down, sober up, and integrate. It took me a while to really pull that off, but in time you should feel more grounded.