Winter,
I'm so sorry your bmom treated you that way. It's so hard for me to read this, as I (and most of the bmoms here) want nothing more than contact with our children. It's possible that your bmom is overwhelmed with feelings she cannot process and contact with you makes it worse. This is nothing you have done. It's possible that she will contact you at some later point when she can handle it better. In the meantime, try to keep her informed of any contact information change, and live your life knowing you tried to reach out to her and it didn't work for now.
PM if you want or need to... and keep your chin up.
Soprano