Lack of sleep

Since my schedule was change, I always sleep less that 3 hours because I am taking care of my child although 2 times a day but it's a big difference if you sleep on normal hours. That's why everytime I go to work I am always sleepy (Sigh..) Can't help with it because it's true. I dont know how will I handle this matter. I tried hard not to sleep during duty but cant help my eyes from falling huhuhuhu. That's also the reason why I can't do blog sometimes because my brain can't work properly. Sometimes, people cant do there work properly or there usual doing if they are sleepy (Well, i believe in this I don't know to others.)