Everything is possible !!!

It depends how you work on it.

You should make proper timetabe and you need to cut all the social networking. You will have to devote 8/9 hours for self study. You should have to work hard till the  last minute of your preparation . You have to start with NCERT first , when you are done with it try to solve 20/25 year CBSE -PMT and AIIMS question paper .Always try to solve atleast 4 past years paper with 2 mock paper every week .

all you have to do is just believe in yourself :)