Hello aspirant,

There is nothing to be scared or to take tension as according to all previous records there is more than 90% chance of your to get the center of your 1st preference and if by-chance it doesn't allotted to you there is 100% guarantee that you can get your 2nd preferable centre.

Till then you should work hard on your studies for NEET, keeping aside this kind of tension.

Here is a link which will help you in preparation for NEET,

https://medicine.careers360.com/articles/neet-preparation-tips

Hope it helps you..

Best of luck..