hey 

don't panic. refresh the sight or try to recover your aiims password again. you can recover it by two ways. first way is by providing detains of candidate id and registered mobile number. second way is by providing date of birth and registered email id. there must be some problem in server try to recover it again. here is a link which has whole step by step process to recover password https://medicine.careers360.com/articles/aiims-candidate-login 

goodluck