Hello student, 
With a score of 519 in general category, you have chances of procuring a seat in the government colleges like Pt Bhagwat Dayal Sharma Post Graduate Institute of Medical Sciences, Rohtak,  Post Graduate Institute of Dental Sciences, Rohtak, etc.when comparing the results of previous years.  But, one thing to keep in mind is that scores and ranks vary each year with difficulty level of the question paper and availability of seats. You can visit the link below to check the previous year cut-offs of Haryana: https://medicine.careers360.com/articles/neet-cutoff-haryana