Do you have troubles gaining weight?

I have a really fast metabolism and can't seem to gain weight. The funny thing is, I can't eat meat, it feels like it's blocking my airways. Oily food makes me want to vomit but fatty oily curries goes down smoothly.
I'm always underweight by 5 plus kg, no matter how hard I try, I lose weight faster than gaining it. I've tried everything and nothing works.

The struggle of a skinny girl, we have struggles too. 😔