Your weight should be 35-40kg according to your height.... It's OK do not worry...
Take medicine as
Sthoulyahara kashaya 10ml twice a day after food
Avipatti choorna 1 tsp daily at bed time
With Luke warm water
Next Steps
Drink boiled and cooled water with honey (advice don't mix honey with hot water,, water should be boiled and cooled)
Health Tips
Do yoga regularly like sooryanamaskara. Virabhadrasana, sarvangasana etc