I am not a medical worker, but this is what worked for us and our close family member when youngest ones had diarrhea. Please check with your Ped or do your research before using any of these tips.
Do you use probiotics? Up your dosage and breastfeed him as much as possible.
Also if you have baby probiotics -that would be very helpful (not only in case like this but as prevention, esp. for daycare kids). If there is any kind of health food store close to you? Baby Jarrowdophilus: http://www.jarrow.com/product/201/Baby_s_Jarro_Dophilus
is one of the good ones, or Infant Primadophilus Reuteri by Nature's way : http://www.supersup.com/supplements-...tm_campaign=gb
Also Udo's Choice Infant Probiotic.Breastmilk is best possible thing for him right now.
And if you offer water - turn it into a elektrolyte by adding a tiny amoung of sea salt. With diarrhea, there is problem with loosing elektrolytes as well, not only loosing water.
Did you go to the doctor yesterday or today? What was the pill that they gave him at the ER?
Small bites work best, and if you add liquid other than breastmilk - give it on a spoon and wait between spoons for several minutes (that way, irritated stomach won't spasm and he won't throw up everything - large amounts of food to fast can irritate the stomach and it comes out).
Marshmallow root- us very soothing to the mucus lining irritated by throwing up, and it soothes stomach and intestines, too. Health food stores have Celebration Herbals brand with pretty good Marshmallow Root : (looks like this, but Root only): http://www.vitacost.com/Images/Produ...8240201614.jpg
To prepare - put one tablespoon of M.roots in a cup of cold water, and stir occasionally over the next 2-3 hours. It will release mucilagenous substance that heals mucus membranes and by using cold water, you avoid cooking the plant and release of starches...
I am not sure if you started using honey yet, but for toddler who use honey, this can be added to warm water/pinch od sea salt mix/ for taste and extra nutrients, and some kids prefer a bit of lemon juice mixed with all this (and it adds Vit C - always good!).
It sounds like it is passing, so hang in there mama!