When I have been the victim of that kind of character assassination, if I give it time, things usually come out okay. Like you, people who know me either know better or will eventually get around to asking my side of the story or the person who is saying the bad stuff finally gets enough rope and hangs herself.
That doesn't mean it isn't terribly distressing in the meantime. When you make an effort in your life to be authentically good, sometimes you don't come out looking good because you don't have the time and energy to focus on spin doctoring everything you do. Being good is a lot of work, internally and externally. Generally, the truth does come out and if it does not, well, you aren't so much doing it for them are you? You do it from you own sense of what is right and as your worship to God. Haven't people that try to do right and serve God always been misunderstood?
I'm glad that it has worked out okay for you, but I want you to be assured you are not in the boat alone.