Why do i always feel nerves and anxiety and have days where i feel like screaming and crying do i need to take depression pills?

Perhaps, but first: If it was my decision, i'd try to find a good psychologist to talk to in order to discover the best dx. From there, you can follow treatment strategies that might include pills or not. Understanding the reasons for such painful feelings can often suggest life style solutions to a wise, objective listener - even if they elude the person in the situation. Get help - it may be easier than you fear.