i wish my dealer would lace my weed and hook me up with some free stuff.

Like everyone said, it is uncommon to have an experience like that. It is common, however, to let your imagination run wild and fall into the trap of thinking too much. If you just started smoking again, this could be because you are getting really high and are not used to it. I would reccomend to just try to relax when you smoke, take some deep breaths if you start to feel overly anxious, listen to calm or happy music, and don't forget its just your mind playing tricks on you. Eventually you will be back in the saddle.

In case of a bad trip: we love you. don't forget to breath.