Still born?

Okay I am so sorry if this upsets any of you but my sister was still born and after we all found out my mom went into shock & I was really depressed and my behaviour at school changed a lot I started acting out more and every night I would cry myself to sleep , I also went through a fase of making my self throw up and just constantly wanting to die, it is a horrible thing to have to go through and I appreciate everyone who has to go through this it is not easy at all , I was wondering if any of you have any advice for me or my mother because after she died things have not been the same my mom is always quiet and I lock myself away in my room and barely eat , should I seek professional help?