I was fired after 13 years working for a company, took my pto away, denied my unemployment, is that legal for not Reading chart.

after i worked for 13 years,i was fired becausei helped a lady that had a Really urgency to go to the Bathroon, and was saying, please take me , yelling desperately I work in a nursing home as a nurse, and that residents was not on my assignments my instinct was help her right away, took her to br. i went to help somebady else that need me, when i came back she was on the floor. i did not know she couldnt be left alone. before when i used to care for her she didnt have any restrictions. they change the care plan and somebady else was doing her care everyday, i never had to give care anymore or do her charting. that why i did not know . gave me not chance after 13 years with not mistake ever, not complain of any kind from residents. or staff, it is unfair , people made mistake were not f