I think I have ruined my career and my life

I’m 31 years old, currently doing a PhD at a national research institute in Delhi. I come from a humanities background but am now pursuing my PhD in a science subject. While it’s been a challenging transition, it’s also left me feeling unsure about my future. I don’t even know if I’ll be able to complete my PhD because I just can’t seem to focus on anything. It feels like I’m stuck in this endless loop, and I’m not sure how to get out of it. Having been in a research institute for so long, I feel I’ve lost the chance to switch to a corporate job. At the same time, getting a government job feels out of reach—I’ve already crossed the age limit for most of them, and without finishing my PhD, I can’t even apply for higher-level positions. Every day has started feeling like a struggle. Just getting out of bed and going to the institute feels like a huge task because all I see is failure in myself. I don’t know how to move forward or find a way out of this. I cant share this issue with anyone as most of the people around me are either successful and intelligent or the family members who have high expectations from me that i will improve the family’s financial situation. Quitting is not an option and i cant continue like this.