I'm worried because my dad said weed is bad for you, what do you suggest?

I agree w your dad.: Possible effects: anxiety, depression, fear, panic , delusions, paranoia, hallucinations, losing touch with reality, inattentiveness, short-term memory problems, disturbances of thought processes. Fatigue, poor concentration, slowed reaction times ; slowed problem solving. Some people develop dry mouth, have a rapid heart rate or may feel hungry. Cannabis is beneficial for some medical conditions.