I smoked yesterday and now when I yawn I still taste it?

I am going to smoke weed in a while with a friend and I don't want to fail and be coughing so I decided to try smoking. Someone offered me at work and I didn't like it. Then the next day at school I tried again, liked it a little more. Anyway, I still feel the taste of it today. When I yawn, especially. I am not planning on smoking, I'd like to but I won't. I'm also not planning on smoking weed a lot. Anyway, does the taste go away or in what case, how do I make it go away?
I smoked yesterday and now when I yawn I still taste it?
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