Have you ever felt so sleepy but you can’t sleep? What is this called?

insomnia

Insomnia, also known as sleeplessness, is a sleep disorder in which people have trouble sleeping.[1] They may have difficulty falling asleep, or staying asleep as long as desired.[9][11] Insomnia is typically followed by daytime sleepiness, low energy, irritability, and a depressed mood. (Yes I got this from wikihow)

the answer is c

explanation: