Currently you need to manage your symptoms of the gut which are loose motions and pain abdomen. It’s good to have loose motions in your case as all the unwanted
vitamin D will get eliminated. But that can cause dehydration. So start taking ORS which is available at all chemists as much as you can along with light diet. For pain abdomen, you can take a tablet of Drotin DS once off twice a day.
You need to get your repeat Vitamin D along with S.
Calcium, S. Phosphorous done empty stomach once you become symptom free