I get really sad and cry randomly?

About 8 months ago I witnessed my 2 year old niece drown and I was instructed to give her mouth to mouth CPR, even though she was already dead. About a month ago I was raped by a stranger. In between those two incidents, I've been getting very sad randomly, my emotions are changed very easily (i.e. Today my boyfriend said I wasn't very good at a game in the arcade and I wouldn't talk to him for about an hour and I ended up crying really hard.). I also get really down about myself when this happens and can't stop thinking about how horrible ad stupid and ugly and fat I am. I'm 14 and I'm currently in counseling... It's not really helping. What do you think this is and how can I stop it? Thanks.