Shannon, that's a question that you need to ask your doctor.
There are different kinds of heart murmurs caused by different issues, and not a "one size fits all" answer to your unique situation. And you don't want to take chances with your heart!
I have a heart murmur caused by tricuspid regurgitation and my doctor and I have discussed my exercise program in depth. She knows exactly what I do and where my heart rate goes and has given me the green light for my program. I get an echocardiogram every two years to keep tabs on it, but so far, no problems.
When you talk with your doctor about your upcoming test results, tell her all about your exercise program and get her OK for it. Chances are it won't impact what you're doing, but you really want to be sure, you know?