Suggest Suitable Therapy For Stress

I got high with my boyfriend two nights ago and I have only been high a few times in my life and never, ever felt like this. My boyfriend feels fine so I dont think it was the drugs at all. The morning after, I woke up and still felt high. I thought maybe I was just tired and a coffee or two would cure this feeling; it did not. I had to leave work after only an hour yesturday morning. I thought its day two today and I would feel better; I feel more irritated, I am very blunt with people, I talk alot more than usual, I am not clumsy or anything like that. I feel like I am worse than drunk (if you know what I mean).. I feel drunk but I know what I am doing, I do it carefully and safely and quietly, I'm not clumsy or loud or obnoxious like a drunk sometimes would be. I have no idea how to get over this feeling. I did take a pregnancy test just in case and it was false. I hear the flu is going around and a cold so maybe that's just what it is. Work is also very stressful the last few weeks so maybe that's it too and I am over reacting... I am very worried, plz help!