Toggle Autorun

Basically I was playing through Insurgence and I was curious about what all the keys did. When I pressed the s key it toggled auto run and I didn’t mean to. Now the game is really sped up and I just want to change it back to its slower, normal speed. I’m really bad with tech so its probably something really simple but I’ve searched online and I cant find it anywhere. Help would be great! sorry if this is a stupid question!

press m and it can toggle fast foward

Thanks so much!!!