if I forget password of neet form then again if I apply for new password .it will messege on gmail or mobile number.but doesn't happen.i can't understand mera password change hua ya nhi

Hii Sejal!
If you forget your password, you need to click 'forgot password'. After this, you get an email with a link to change your password. You can change your password from there. In your case, you can check if it's changed or not, by trying to login through the changed password. If you face any problem, contact the NEET helpdesk. Hope this helps.
Good luck!