What Is The Treatment For Ovarian Cyst?

I am 21 years old recentyly discovered that I have a 5 cm x 4cm cyst on my Ovary. When i talked to my doctor about it she was slightly concerned because it was filled debris. Now i know that a lot of women have cysts but what are the chances of this being cancerous. I'm thinking that because it is fairly large and with it having debris in it there is more reason for concern. Am i Right? So basically my questions are... should i get it removed, can this interfere with concieving, and what are the chances of it being cancerous.