Symbols of Christ's Atonement Everyday Life

I was driving down the road today and I stopped to let someone in. However, because I did that I didn't make it through the light and she did.
I imagined that it was me she let in, you know switching places sort of thing. I imagined how I might feel as I drive through the yellow light knowing the kind person who stopped to let me in didn't make it through the light.
The feeling I imagined myself feeling was sorry. I felt bad because I got through and she didn't. Then I asked myself why? Why should I feel bad?
In the actual situation where I was sitting at the red light and the girl was driving away, I wasn't upset in any way. I was at peace. If the girl knew I was at peace would she be able to be at peace too?
What if the opposite were true? What if I was very upset that I did this nice deed and then I, ME, got stuck at the red light!? Would that mean that the girl would have to feel worse for me letting her in? That she would carry a sense of guilt, because I was upset?
So my question is this, can she be at peace, even if I am upset?