Maybe chemicals in the bud? that could do it,might also just be the strain,and if you ate to much and toked hard,that can def upset ur stomach and 2much,also is it possible the bud could be moldy or have budrot,could be a number of factors,just don't over do it,weed is like fire,a little warms...alot burnssss. Maybe panic attacks or anxiety ....just smoke less...:rastasmoke: