There are almost 1255 seats in B.Sc Nursing in West Bengal including all government and Private colleges.
Among these, only 36 seats are reserved for OBC- B category.
So as per your rank, it is difficult to get into a college.
But some of the candidates withdraw, some get into another course, so many seats left vacant, and your rank is not so far.
Keep hope.
You may get a seat in private colleges.