Hi, 

Well with your AIR it sems difficult to get a seat in government medical college. 

In 2018 the lowest rank ws around 6k for GMC, Manjeri.

So chances of government seat is very less. 

However you can try in self financing medical colleges or even in deemed unicersities.

I shall attach few links for better help:

https://medicine.careers360.com/articles/neet-cutoff-kerala

https://medicine.careers360.com/neet-college-predictor

All the best