Should i quit?

I’ve been working for a telecommunications company for over 4 months, in customer care (which includes billing, complaints, and collections), i do both inbound and outbound .. 9 hours a day. I receive back-to-back calls all day everyday. There’s always a rush which does my head in.. targets are unachievable and theres too much stress from all sides.. management listens to my calls live while i am talking to customers and keep judging every thing i say and scrutinizing every slipup i do. Which leaves me feeling underappreciated no matter how hard i try.. recently i’ve been dreading going to work, even though i work from home which is a big plus for me. And the pay is really good compared to other jobs i can land. But nevertheless i feel extremely depressed just thinking about taking another call, even in my days off all i think about is going back and taking another nasty call. I lost interest in doing all the things i want to do i just feel like escaping, but i’m scares if i’ll find another chance.. but i feel mentally drained that i stopped taking care of myself.