The only effective way to know for sure if you did something that could upset her is on one side, listen to her. Ask her for an explanation. And then, observing yourself and your patterns. I’m not implying that you are the one to be blamed.
Only, sometimes, we perceive comments, behaviours...react according to what is happening inside us. Even when we don’t want to do it.
Don’t feel guilty for openning you up to another person. How are you gonna progress if you don’t take that risk.

I understand your confusion and how you are feeling now. Letting yourself a time to be sad and letting a time to see what could happened.

PS.: Money is only a necessary evil.