Do you believe when you are down on luck?

Ever felt you are down on luck? Sometimes it is felt like you are feeling negative and can't seem to think straight. I could even felt distracted easily. I came down on a escalator and almost step onto another escalator that goes back up. I even did not ask for the change when I went to buy drink. So do anyone feel this way before? There is currently no crisis in my life so I am fine.