Need your opinion

I am a frontend developer, working in a service based company, still have 1.7 years of experience, I dont know how I fell into this situation, but I got ownership on the frontend of a very large enterprise app in our project and our client is a big banking American company. At first I was content that I was learning angular and making proper decisions to keep things smoothly, now it is eating up my life, and to say this is the First development project and first application I am working in my career. I conveyed that this thing is too much for me in the beginning itself but nobody listening and now all are behind my back on updates and its killing me from inside, what do i do in this situation? I am not able to switch due to long notice period and even the recession is at large. What do i do??