Koby

I drove my car yesterday and it ran fine. I went out and started it up about an hour after driving it and it has a horrible stumble when idling and when just starting out. It feels just like a burnt spark plug wire. As the day goes on it gets worse and on my way back I was going about 70 and the car was just jerking back and forth. Right now I am checking all the spark plug wires to make sure they are fine. Any other ideas? I can tell I am down a cylinder just by the way it is running......atleast that is what it feels like.