Sudden weight loss occurring , but am happy , is this safe?

today is my day four on my first day i was 90.5kgs and now i am 87.5 i lost nearly 3kgs in just 3.5 days . i had fruits and vegies alone and one hr exercise . is dis healthy . wil i lose my charm and complexion . if this happens wat will be the result after a month . pls help me and make it clear . i want to reach 50 kgs