please my bmi , the calculator below says i am underwight and i need to gain weight, my weight is 60kg and height is 1.9m,,,https://y2calculate.com/bmi-calculator-advanced/
I put your numbers on the calculator as well, it is indeed showing that you are underweight. Actually, I would rather be a little under-weight than over-weight. I would start eating more healthier carbs and also ask your doctor if she/he knows of any dietitian that can help you.