Turn and walk slowly away from the mess you were in. Nothing can of course bring back the baby she destroyed, but perhaps is she did have that baby and you were not married she would be in control. What kind of life would that child have then. Father's don't have an easy time of getting custody of children. Remember, you baby is still a part of you, but it is safe from any further harm.
You should pull you boot straps up and head for a real life. It will come, with patience. Once day you will have a family with someone who truly wants to share that with you. Just remember if you meet someone who cannot have children, but already has children, they will love you as much as if you were their flesh and blood. I have been there with my growns sons.
Most likely she is a sociopath so in her reality the ends, justifies the means. They have no conscience and are out for their self gratitfication. They are capable of looking you straight in the face and lie about what happened and why. No emotional attachments towards others, but what they want you to believe exists. You cannot change who they are and there is no need is spending your energies in hating her for what she has done. You will be the only one to suffer. It is time to let go and move on.