Is OTHER wrong in the post ? POST : Sorry for the text wall but this requires some backstory

I recently quit my job as a palliative nurse working in a local hospice due to the sheer amount of stress working there caused me

I had worked there for 4 months at this point and the job was definitely wearing on me and more often then not I would leave mentally exhausted and my patience/drive to do anything seemed to be decreasing daily

It all came to a head last week when one of my former patients (Dementia) entered into an extremely violent mood that took several hours to calm down from, during that time they became dangerous to everyone around them and inflicted a number of injuries on staff members, myself included

After everything had calmed down however I realised how angry and fed up I was with everything to the point where I genuinely wanted to hit something or someone and was even trying to find an excuse to start arguing or be aggressive, the bruises on my chest from where the patient punched me was also pissing me off something chronic which didn't help the situation

it wasn't long however before It was pointed out to me by a colleague how bad my new attitude was

After that i made sure to keep to myself and spent my lunch asking myself what the hell was wrong with me for getting so worked up when I knew going into it what this job entailed before visiting my superior and asking for their advice

Ended up having a decent heart to heart before we both agreed that this just wasn't the right job for me so I resigned 

Now my issue comes up this morning, my sister, whose children I was supposed to be babysitting for tonight, rang up to double check the arrangements, we got chatting and I mentioned my new unemployment state before I gave her the roughly the same explanation as you can see above

Her response to this was to tell me that she no longer trusts me to look after her kids &amp; that I am a horrible person who should be ashamed of how I acted before hanging up on me, since then I have had several social media alerts pop up from various others in my family and on my friends list agree with her

I know I was a bit of a twat for a while but I thought I had actually handled it pretty well and fairly maturely once I got my head on straight, until this happened and now I am seriously doubting myself

So AITA?