I'm such a cry baby.
Why do you think that you are a cry baby?
I am having trouble holding it together. I cried yesterday when i accidentally snapped the top of my pencil.
Crying is a normal thing and it's good that you're able to express your emotions. That being said crying over something small like that isn't normal. If you think you get too emotional you should probably talk to someone about it.
It's too overwhelming.
Maybe you are holding onto a lot of stress and this is the reason why something small can send you over the boiling point. Try to examine your life and figure out what the things are you are stressing about. It is fine to cry, but crying too much may be a red flag into deeper troubles.