Dear Varsha 

You are surely qualified with 43 percentile as the minimum percentile is 40 for ST but sorry to say that, it is not enough to get a seat in any of the JIPMER. And yes, you'll be eligible for counselling, most probably in the final round which generally happens only in case of vacant seats(very few).You cannot participate for the 1st round as the memorandum says only the shortlisted candidates (ST) falling between rank 1-90  can only participate. 

Last year, the final round was held for 3 vacant seats each from UR and SC (no vacant seats for ST) and each and every qualified student, despite of their category were eligible which is very much difficult to get a seat.The cut off rank for ST in 2018 was 74 and only 9 seats are reserved for ST.

Hope this helps you.