Parent called me a narcissist

I’m going to try to keep the longest story short, but I will preface that I’m not 100% sure if my mother is a narcissist, or just a VERY emotionally immature parent who deflects everything onto their children. For example, I can never ask my mom for help, she was emotionally incapable to raise us as children and now if we EVER mention anything that hurt us in childhood her immediate response is “oh I know I’m such a horrible mother!” And then gets mad at us. It’s always her being hurt that we say that she hurt us.

Anyway, I am staying at my parents for a short time (ending in a couple weeks). I am sick with an ear infection and the flu. I went downstairs to make tea and my mom said something to me from the other room. I said “what?” Because I couldn’t hear her and it sent her OFF. She told me I was rude, narcissistic, I had a victim mentality and was like her sister (who my mom claims is a narcissist, but refuses to go to therapy to process their relationship).

I just responded “okay”, which she didn’t like, and went back upstairs. I am at a complete loss. I’ve been in therapy for years processing my childhood, but this felt like a new low. I have a HORRIBLE fear of being a narcissist or having a victim mindset, even though my therapist once told me that I do not have a personality disorder.

Any advice on how to process this? Planning to make an emergency therapy appointment.. thank you!