I'm sorry if this is unhelpful or invalidating... but personally, I'd say forget the scales.

You are doing a wonderful thing for yourself, for your body and your family. If you gain health, energy, self-esteem, modelling self-care to your children... does it really matter what you weigh? Health - psychological and physical - is so much more than that number. In fact, the former can only be limited by attachment to a measure which will not provide you with an accurate reflection of your progress or well being.

FWIW, l have been 'underweight' according to BMI measures my whole life yet my health, fitness and happiness have varied greatly.

I hope you start to feel the benefits of the great work you're doing, numbers or no. Kudos for your efforts.