Hello student,
You have not mentioned which category and state you belong to. With a score of 220 it becomes difficult to secure a seat in the government medical colleges when comparing the results of previous years. Last year,  a score of 550 or above secured a seat in the government medical colleges for general category and a score of 500 or above remained to be a safe zone for the OBC category. But scores and ranks vary each year with toughness of the exam and availability of seats . However you can predict the colleges which you are likely to get using the given link
http://medicine.careers360.com/neet-college-predictor
Good luck

National Eligibility cum Entrance Test

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