Losing track of day

I go through a day with little stress and at the night I got this feeling that all the rest of the day was not lived.it feels like I just got awake from a sleep at night but it was not sleep I was awake all during the day..thsi sort of lose of sequence is happening often and it's making me depressed and also afraid of my own stability..I think it was mainly due to stress and this happens even if there was mild stresses in the day..