Missing work

I’m 22 and have been working at my full time job out of college since July. Today the weather is pretty bad and my streets are snow covered. I had a planned schedule for work today which involved meeting someone this morning. I just recently lost my best friend due to a car accident in snowy conditions. While driving to work today I started having a panic attack and told my boss I’d have to miss the meeting due to the snow. The roads aren’t terrible but they’re not great. My boss didn’t seem too upset but I know she is a little because I missed a meeting. To me, especially since loosing my best friend, one meeting doesn’t matter. But I’m curious how other people feel. I can’t help but feel guilty for missing the meeting