@The grey sheep ,
If you want my opinion, she doesn't want sex with you, rather a dad for her baby, perhaps along with that, financial support..
If she had feelings for you, she would not push you away.
In addition to this, you've been together for 30 days, she's 3 months pregnant, and you call the child ( yours ) " with the babies dad (not the real dad) ... In 30 days you feel you've bonded that much? And, she won't have sex or let you touch her?
If you want an instant family, how about finding someone to love who will love you back and give you a child over time, getting to know each other.