BMI isn't a great way to test. It calls heavily muscled, strong and lean people as overweight or obese (when they clearly are not), and flabby people with minimal lean tissue as 'the correct' weight, even though they are carrying unhelpful levels of body fat.

It is better IMO to not worry quite so much about weight per-se (especially as it can stabalise and/or increase while you are still being effective at reducing fat) - instead (or as well) track your hip-waist ratio (looking for waist <90% of hips) and waist-height ratio (looking for waist < 50% of height - the cutoff of morbid obesity being suggested at 63%)

It isn't ideal, but it should give insight into how you are progressing, (similar to the 'my clothes don't fit any more' test).