Dear Jon,
There is no need or necessity for an FIR to be there in the case of complaints preferred under DV Act. What is necessary to be proved by the girl is that there was mental and physical harassment as envisaged under Sec 3 of DV Act.
You have not specified clearly where the petition is instituted when your marriage took place, whether you both are residing separately or not.
You can always prefer Criminal revision Application by challenging the issuance of process before Court of Sessions. For the same you will have to establish grounds that the process which has been issued as against you by the lower court is bad in law and the case does not fall in the category of DV Act.
You can as well prefer petition before High Court but the same shall be a Criminal Writ under Art 226 of Constitution of India r/w Sec 482 of Cr P C. Preferring petition u/s 482 of Cr P C is not advisable as Supreme Court has laid down norms and High Courts even sparingly utilize inherent powers.
Hope this clarifies your query. If you have any more query, feel free to communicate.