Feeling guilty. Is this normal?

Hey all :) as most of you already know I ended it with the N this time last week. I've felt ok-ish the last couple of days but I'm quite new to this process and so I still find myself questioning things from time to time. This morning I remembered a conversation I had with the N, she was telling me about how when her previous partners had pissed her off then she would rage at them and say the nastiest things. I never experienced this, I always got the silent treatment and in a way I was glad, she said "I would never rage at you because I can tell you are more sensitive, those other girls could handle it" and "I know you're looking for an argument but I'm not going to fall out with you". I ALWAYS got the ST instead, anyway I'll get to the point...one time she said "If I have an outburst with anyone then I'm mainly just frustrated but if I'm really angry then I just go quiet". Does this mean she was more pissed off with me than the others? I swear I was nothing but nice to the woman, I gave her a very easy life! Since I ended it she has gone silent on me which led me to wonder is she angry with me? If so then what did she expect? I was getting nothing from her, she drove me to end it. In fact I often wondered if she was trying to get rid of me so if anything I did her a favour. For all I know she may be thinking good riddance but do they really expect us to hang around and never tire of their behaviour? If they don't want you to leave then why do they make it impossible to stay? I know none of this really matters, that N conversation just popped into my mind thats all and I was left feeling guilty like it was me that had somehow offended her, is it normal to question yourself like this? Thanks for letting me vent, hope you're all having a great weekend Xxx