Lack of sleep

This past one week has been a very tiring week. I have been working at the shop everyday from morning till midnight. Woke up in the morning, eat breakfast which is normally a mug of oat and then off I go to work. At the shop, do the mopping and cleaning of the shop before waiting for customers to come in. Had to be there until 12 midnite or normally after 1am. Then went back home, sleep and start the new day all over again. Manage to sleep only for less than 7 hours. Now feeling very tired and sleepy.