Diarrhea advice

My 8month old son had woken up with explosive oatmeal colored diarrhea the past two days. His poop was oat meal colored a day or toe prior to that. Yesterday that was the only bowel movement he had until this morning. My doctors office isn't open for another two hours. Any ideas, or has any one seen this before?

    I agree with Brande and Sheila.
    About Stacy Koenen
    Current: Hales Corners, Wisconsin
    Birth: January 09
    On Moms.com since: Dec 18, 2013
    I had my first child in April 2013, just before our one year anniversary. Riley has been an absolute joy and I love every minute of being mom. But I am the first among my friends to have a child, so there isn't always an easy place to go for advice.