Dog Throwing Up Worms!?!?

Ok my Black Lab totally freaked me out yesterday. I was sitting here on my lap top in my comfy chair and he just threw up. I hate when they do this to begin with but when I got up to clean his vomit up I freaked out and hollered for my husband because in his vomit there was these gross spaghetti looking worms. I immediately started looking up what this could be online, don't you just love the Internet. I think the Internet is great considering he did this last night after our vet was closed. Anyway I soon discovered that they were probably roundworms. But I still freaked out at this because you see, my Black Lab "Harley", is only going to be 6 months old on April 13th, 2009, and I have spent a fortune on him keeping him current on all shots and worm medications. But apparently they still can get worms at any time. So off to Wal-Mart I go, a 49 mile drive, to buy some worm medication, because everything else is closed around here where we live. So I get there and find the pet isle and then there it was, a whole damn shelf full of worm medications. Which one to buy? God only knows. I stood there for the next hour reading all these bottles, looking up on the Internet on my cell phone these ingredients, and getting infoemation on the best product to buy when I finally decided the hell with this. I called my vet's office got his answering service and asked them to have him call me. I mean after all I have spent a fortune at his office over the past 10 years with our dogs so it is not going to hurt him to call me after his business hours. Ten minutes later while I am still standing there in Wal-Mart my phone rings and it is Doc. I explained everything to him, and he tells what I can buy or if I wanted to wait until tomorrow (now today) and come by his office he will send me some worm medicine home free of charge, well except for the gas money. I of course asked him if it would be ok for Harley to wait until tomorrow (today) and he said that it would be fine. So since my husband drives right past our vets office to go to work each day I decided to go back home and let him pick up the medicine tomorrow (today). So I drive 49 miles back home, took a shower, and went to bed and fell right asleep from the stress I had just endured from one of my loves of my life, Harley!!