I asked this question before but only had spam. anyway I am 40 with 4 kids?

and I lost 1 kilo in one week. I was 58 kgs now 57 kilos which is 126 pounds I think. I am 5ft 7. waist is 26.5 inches, hips are about 33 inches and bust is 35. what is my BMI? and do I need to lose anymore weight? thanks