Help a girl quit her toxic job!!

I’m a very shy and anxious person. The job i’ve been working at for at least 6 months has been so toxic. The manager bitches about everyone behind their backs to everyone. He yelled at me when i told him i was sick. And then tired to lie to the owners of the company about an incident that happened to me where he left with out notice and said he was there witnessing the incident when he was not. I’m scared to put in my two weeks because i don’t know what he is going to do. Help a girl out