Wow,
You make me feel bad about my problems. I think Yue is right, you can’t stay there any longer if it’s physically making you ill. Can you go on vacation somewhere very distant or sit for a couple of days by yourself and listen to your heart. What is it that you want? It sounds like you already know you just need to give yourself permission. Do you have to stay in India? There are a lot of places in the world where it is safe to be a single woman, and certainly many places where something like a dowry would be considered grotesque. You do not literally have to sell yourself. I do not wish to offend, please forgive me if I do, but you’re educated why not live for yourself not others. Good luck.

The torment that so many young women know, bound hand and foot by love and motherhood, without having forgotten their former dreams. ~Simone de Beauvoir