I was loosing weight very fast now slower

I am 25 years old I started losing weight from 74-75kg to 64-65kg am doing 48h fasting I started it from 25/5/2020 (it was easy for me to adapt because i was fasting for the whole month of Ramadan) at the begging I was losing very very fast but now am losing very slow I don't know why am trying to drink coffee hoping it will help am also taking salt to increase BP