gahhhhhh - the sound a person makes when they're confused and too tired

the sound a person makes when they're confused and too tired to think

Gahhhhhh, I just got a B on my math test and I'm too tired to care.

Gahhhhhh, my friend forgot my birthday and I'm too tired to be mad.

Gahhhhhh, my mom said I have to clean my room and I'm too tired to move.