If you’re fasting, you’re burning fat. It would be impossible to truly stall. If your weight isn’t dropping, that just means you’re retaining water. Fasting made me retain water even more intensely than I did before - I once gained 7 pounds during a 5 day fast then lost 13 pounds the following week after my period started. As long as you feel fine, keep going!
Do you happen to be using salt to help ease feeling yucky? I followed the Master Cleanse book one time and they said to take salt every morning. 10 days and I lost zero pounds - so frustrating. So I looked it up online and saw several comments about the salt. I stopped the salt for the last two days and lost 5 pounds each of those days!!