File an FIR or just inform the police about the fraud that has happened with you. You’ve the medical documents to support her allegations too. Hire a good lawyer and prepare a strong case against her.
This is a case of looteri dulhan and please make her photo public so that other people don’t get scammed by her.
PS- marriages are not doomed, not all the women are after alimony. I am happily married and I’ve married people around me who are happy in their arrange marriages and love marriages too. My cousin got divorced after 4 years of marriage (plus 9 years relationship), she didn’t take a single penny from her ex.
Don’t be disheartened, we’ve all failed in love. You also got on the wrong path, don’t worry you’ll come out of this.