Need to vent, Amazon please do better…

I had a awful day today at Amazon, it was my 2nd day back at work too after having surgery for cancer.I was out for 3 weeks and I work FlexPT for 2 different departments I got yelled at by a PA as i was walking into work, wasn't on the clock yet. She told me to put my phone away and i tried explaining to her that I wasn't working her department today and not yet on the clock, she yelled at me again and said "did i ask you what your doing? I said put your phone away now" and walked off. It made my whole shift feel like i had no motivation and I wanted to just leave. The worst part was i had my phone out because i put my station # in my notepad as I suffer from brain fog and I forgot where i was heading so just hot it out to double check where i was going. Plus i am hard of hearing and my hearing aids are controlled by a app on my phone. My whole day just feels ruined now. Thanks for letting me vent.