I doubt it was laced. I have felt that way before: it was the first time I got very high and I was an inexperienced smoker. I was shakey, my heart was pounding, I felt emotionally terrible and out of control. I was saying "I'd rather be dead than this" and was totally freaking out. I'm glad in hind sight that I didn't let that one experience determine that I wasn't going to smoke weed anymore. You will get used to those feelings of paranoia and being in an "alternate reality", so to speak. Now I wish I could get that high again--but it'll take a lot more weed now that I have such a tolerance. Good luck- keep smoking.