The qualifying score for unreserved category in NEET 2018 is 119 which is a fall from 2017 when the qualifying score was 131. 

For unreserved category NEET marks cutoff for 2017 in government colleges in Kerala ranged between 583 ( TD Medical College, Alleppey) to 608 (Govt Medical College, Thiruvananthapuram). If we take last years cutoff as a benchmark you may not be able to get a seat in the government colleges, however due to the fall in the qualifying marks between NEET 2017 and 2018 , the cutoffs may go down a bit and so you may have a slight chance. You definitely have high chances of getting into good private colleges and deemed universities.