Timing problem?

Hi. I have a 1996 chevy silverado 5.7l 350 and I recently changed my distrubutor, distrubutor cap, spark plugs and spark plug wires. After installing it I started it up and notice that something wasnt right and that my check engine light was on, after further inspection I noticed that my number 1 and number 3 wires we mixed up so I corrected my mistake. I started it back up and it shakes wierdly and my check engine light is still on so I was wondering if my timing was off because of my mistake?
Thanks,
Tye