Dear aspirant
At first congratulations for your result and best wishes for your future.
Analysing cut off and opening and closing rank trends of previous years I am afraid to inform you that you may not get any seat for MBBS in government medical colleges through All India counselling for 15 % seats .Based on previous year's cut off some of medical colleges of Bihar you can get through state counselling for 85 % states are

Government colleges are very tough for you despite of OBC category
You can miss them by close limit that is lesser marks
some other good private colleges are

Mata Gujari Memorial Medical College, KishanganjMadhubani Medical College, Madhubani
Katihar Medical College, Katihar
Narayan Medical College and Hospital, Sasaram
check here further
https://medicine.careers360.com/articles/neet-cutoff-bihar/amp

predict your chances here