Waking up disoriented and weakened anyone else in Amir's position would have panicked, but he didn't. There was no reason to in his mind because if something bad were to happen, it would happen whether he liked it or not.
That's the kind of mentality he carried, which prevented him from panicking and making the best choice in any scenario possible. Even if it puts his life in danger.
However, there is one exception to it all, a scar that had been left in his mind during Yethel Cynark's war and the little fat dwarf that attacked him and his acquaintance in the form of Farhad.
That time, that dream had left a scar on him. And he knows such an illusion was built by none other than Jester, even if that dwarf might just be a carrier of his will.