wth is going on

while play cf idk what happens but this never happend before on any game i played my char starts to move by himself with the last thing i hit like if i hit w he will keep running stirght at the wall for like 5 seconds and everything i hti has like 20 sec delay so hes moveign aroudn all crazy and i cant shoot its like i haev no control but it stops like after 10 seconds but it happens in the most INCONVIENT TIMES like during clan war when im about to get the last kill then bam then its like WTH ugh what is wrong?