On and off sleeping

Does anyone get on and off sleeping at night I get seven or eight hours a night but not the full 7/8hours Sometimes I get four hours sleep for and get up for an hour and another four hours sleep sometimes three hours get up for 20 minutes and sleep for three hours and get up for 20 minutes and sleep for two hours but I always have a shit day sleeping like this if I get a full 7/8hours it would be perfect I would enjoy life more but the flu and this cold weather ain’t helping me Out either