"Bad aim" days

Hi, for context I'm a newer player. Started playing around 4-5 months ago and just recently reached bronze. I just want to know if there's a such thing as "bad aim days" or if I'm just not good. When I played today, my aim was absolutely terrible. My crosshair placement was way off as well when it's usually not that bad (I shot mainly leg/body shots when I usually hit body/head.) So, if this is a real thing what's the best way to get rid or fix my aim for the day? Any advice is welcome, thank you.