If the concealed fact is so material that you could have not been ready for the marriage then you can nullify your marriage. You could file a suit under section 12 of the Hindu Marriage Act. But the limitation period for filing such a suit has lapsed and it will not give you proper relief.
File a complaint under the DV Act
You should leave this idea and invoke those rights available to a married woman. In this scenario, you should file a complaint under Section 12 of the Domestic Violence Act. You may seek any remedy available under section 18-22 of that Act. The monetary relief, protection order and residence order would be suitable in these circumstances.
The Magistrate has vast power under the DV Act, he can grant you an interim relief at the time of filing of the complaint. You should live in the matrimonial home because you are a legally wedded wife. It is the responsibility of your husband to perform his matrimonial obligation. He cannot neglect you or be bound to live a miserable life.
The protection order will stop any kind of violence in the matrimonial home. The residence order will compel your husband to provide you with a safe and secure accommodation. He is bound to provide such an accommodation in the matrimonial home or any rented house (subject to his financial capacity). You have no source of income and also you are pregnant so the court may direct your husband to pay a monthly allowance under the monetary relief.
Avail the services of the Protection Officer
Your parents are not ready to help you then you can seek the services of a protection officer. The DV Act provides that an aggrieved person can approach the court through the protection officer. The State Government is obliged to appoint a protection officer in each district. That officer will file a complaint on your behalf and he may also do some preliminary inquiry in your case.
You should contact the station in charge of the Mahila Thana. She will provide the services of a protection officer at free of cost.