Based on trends of last year cutoff which was 19,008, you would easily get a seat there.
But, I can't understand your next question. Didn't you register for first round or what?

Hey.
For admission in Doon Medical College, dehradoon through NEET, the cut off in 2017 was a rank of 19,008 and 521 marks for the General Category under the 85% State quota. If you have scored marks around this range, then you might have a chance for admission here in the 2nd round.
Best of luck