Keep going and know that your in the right direction.
All bodies are a little different.
Yours may take a little longer to notice change.
Paying close attention may be a little like waiting while watching the clock. Gets frustrating.
Realize that regardless of what the scale indicates at any moment your body is progressing into the fast. There are different levels or stages with this.
Your body is heading straight into it and will be cleaning, healing, repairing, and using up many kinds of useless tissue.
This is all good, regardless of what the scale may be singing today.