weird email notifications

I'm worried about Coke, he's vomited three times tonight.  First one was mainly food, second was more food but it was more liquidy, third was almost all liquid.  It's grayish in color, no blood, except for the first one which had a few blades of grass.  I know everyone vomits at some point, I'm just paranoid.  Last night Coke ran away for a while (like 20 minutes).  We went out to get Icees and when we got back Nikon ran out the door so DH went after him and handed me all the food and as I was going in, trying to shut the slider with my hands full Coke pushed me and ran away.  We were hunting him down the whole time but it was so dark and we chased him all over, I'm scared he ate something bad in someone's yard when we couldn't see.  He's the type of dog where he eats first, sniffs later, if you know what I mean.  He ate his dinner around 6pm today and then at 9pm DH took him for a jog.  About a half hour after that he threw up the first time in the house, then again on the porch.  We thought maybe he just had an upset tummy from the jog.  When we got back from seeing a movie he had thrown up again in his crate.  He seems under the weather, he just wants to lie down.  He did just get up and take a long drink of water.  After he threw up the first two times I offered him a little bit of food so he'd have a little something in his tummy but he refused.  Hopefully it's nothing but now I'm worried and don't want to go to sleep.  He does vomit when he eats too much grass but it is always more like phlegm with the grass, I've never seen him throw up so much and gray liquid.  Poor Coke!