Thanks for everybody's positive comments. Sorry I sounded like a Nervous Nelly about Tyler! His doc says she thinks the murmer is just a Stills murmur, which I have since learned is nothing. She told me it shows up in kids age 2-6 and that it's basically just an echo that can be heard because of the size and shape of their heart and chest cavity and that as they grow, by age 6 it won't be heard anymore, but if it's still there after that, then they'll check further into it. So in the meantime, no worries....life as usual.

I was just sort of shocked that day because as you know, you never want to hear anything about your kid from the doctor other than "everything's perfect". I ended up talking to her today on the phone because I had more questions and was very reassured by all she told me. Then I looked it up online and felt even better.
Holly - I am glad you are feeling better about things. It is very nerving when a doctor tells you information you are just NOT prepared for. It the mothering instinct that hits and we want to immediately protect and defend!
Keep looking for those docs!!! They will come....