Good day, I’m writing anonymously I don’t need to

Good day,
I’m writing anonymously I don’t need to introduce my self I just need some piece of advice from your page.
I am working with a woman in a mini standard Business Services (Computer Stuffs i.e Desktop Publishing, Photocopy, Printout and all), have been working with her for a year and some months now suddenly I found out that her trust on me was no more.
She started doubting on me on anything that goes missing or our consumable item was out of stock very fast from the day we bought them, a single mistake I will surely get a very hard hit words from her. I was planning leaving the workplace and find elsewhere but scared of not getting job elsewhere or meeting another problem ahead also I’m not financially stable. I’m a student with SSCE certificate saving my salary for further education. though I have parents but things are not quite well. Believe I don’t still from this woman, I can’t work for someone I know outside the company and take the money for my self a lots of rules are flying round the organization. I spent most of my days at work (14 hours 7:30am to 9:00pm everyday) I don’t want to destroy my good image from people have known before from the organization as a good person from leaving the organization without noticing anyone
Please I want this private..
What can I do