What silverhill said above. I strongly endorse that, a lot, all of it.

And I don't think you were stupid to call her, either. It's reasonable to ask for an explanation, and a mature person would be able to give one. Especially after time has passed and the immediate emotional reaction to whatever it was you supposedly did should have subsided, allowing for some rational, adult discussion. Instead, she's going for some marathon silent treatment, and comes off looking petty, childish and unjustified.