Hello Satheesh,
Based upon your score in NEET 2018, You have decent chances for admission to Government Medical Colleges under All India Quota and state quota. Use NEET College Predictor to Check Your MBBS/BDS Chances in All India Quota, Deemed Universities & State Quota seat Based on Your NEET AIR

https://medicine.careers360.com/neet-ug-college-predictor?icn=neet-clgpd&ici=qna-answer

This would help you with all the possible options.

Hope this helps.

Regards.

Tanushree Seth