Obsessed jealous psycho who wont stop stalking me!?

My son's dad's gf has been stalking me for almost 2 years (since I met him). She makes fake pages of me out of jealousy and claims that my son is a doll and says all these lies. She keeps saying that me and all my friends want her and my sons dad when really its not even like that. She has her friends har me and look at my facebook EVERYDAY. My sons dad left her and we ended up having a baby together and all of a sudden I started getting threats saying they were going to kill my son. She lies about everything and she makes everyone believe that its not her when really it is. I haven't been on fb because of the drama. She is really obese and she always talks trash to my friend about how she's way hotter than her. My friend and I have modeled for years. This girl is not very wealthy and I don't understand why she keeps bugging us. She convinced my sons dad to get a DNA test because she was jealous. He doesn't want kids with her. Now that the time has come to take the test she has called me non stop from a blocked number saying "stay away from my justin". I'm in california and she's in florida. I left him because she gave him an std, he cheated and he got a dishonorable discharge from the military. She always tries to "befriend" us and she always talks about how pretty I am but she turns bi polar and flips out on me. She's doing everything in her power to keep my sons dad away from him. She has a serious case of obsessiveness and jealousy and I can't have my son around that. She makes fake pages of herself and tries to pin me down for them when I have nothing to do with them. I've tried to ignore her, I've changed my number over 6 times because of her and yet she still envys us. I just want her to get over her "love sickness" lol with us and move on. I am happily married and I am getting my sons dad for child support. I just want to live my life WITHOUT having to be so private to my friends and family because she is updating on my life! I received a few links from my friend and it has the girls picture and it says she's a child molester. Idk if its real or not but her stalking has gone over board. Now child molesting? Anyone have some good advice on to what I can do to make her stop. Why is it that girls feel the need to be so jealous and protective? If a man truly wanted to be with you and loved you he wouldn't have cheated more than 5 times and he wouldn't have babies with 2 different women. I learned my lesson and I left him. She has lied so much I think she needs medical help. I can't believe how the world is now. She made this fake page on facebook to make it look like someone actually would give her the time of day to talk about her. She literally crops and photoshops her pictures and then calls herself gorgeous to impress people. And then she put her TRUE self as the main picture. The e mail is amberfatafat@aol.com. its really pathetic. Some people need to grow up. I have a 5 month old that she knows everything about me and him because she stalks me so much. My sons dad doesn't even know as much as she does. What can I do to make her stop. I've tried everything from ignoring, blocking her, etc, etc..