Is my bd dieing or brumating?

i have a rock mabey 1ft wide 6inches long and its very flat but being supported by his log and he has been under there for a few days he has no eaten or drank or even moved at all if i poke at him he doesnt even open his eyes and hes really cold but hes not black hes really bright yellow and orange but im not sure if hes brumating or if worse.. and hes only a year old .. if hes brumating how long does it last? cause im mad at him if he is cause its finally warm enough for him to come for car rides