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2000 mg of Ca++ and 2000 IU of vit D I hope and not 2000 mcg unless you were very deficient when you started taking them.

Make sure your vit. D levels are OK. A lack of vit. D is even commoner than lack of calcium as there are fewer sources of vit D in our food than calcium.
I hope you will be on your feet soon.

Sorry to read you broke your ankle.

I have had a quick look at the scientific literature available and there is little evidence that electrical stimulation works. Exercises are your best bet....