I know exactly what you are talking about. The first, and most likely, is that it could be just a different strain of pot that your body reacts too differently than other kinds of pot. If you still have that pot, don't throw it away, just don't get really high...just get a good buzz going. But, if you have had this experience with other kinds of pot, then I would just do what unconscious said...lay off the pot for a while. That is always the key. Whenever anybody is having trouble with pot, laying off of it for a while usually is the key to fixing the problem. Good luck