Just a little shock to the system. Vitamins are a good idea. Get plenty of sleep. Eat healthy
and stay hydrated. It just a hangover. Your not used to getting so toasted. Take it easy and don't smoke as much again for a while. You have probably experienced the worst effect that bud can have on you. It's not like you took an acid trip. You won't feel this way for long. You were correctly told that is propaganda and no truth to it. Peace.