Got a mole removed. Scab accidentally got scrapped off. What should I do?

It is not uncommon for something like this to happen with a shave excision, the scab normally comes off when the underlying skin is healed enough to protect it from the outside environment. There is not much to be done at 5 days in regards to the indentation, but it should significantly improve. I always recommend keeping any wound moist so it can heal better, this means keeping some sort of ointment over the area. I would recommend asking your dermatologist specifically because they know your situation better. In the end you should heal fine, if not, you can talk about revising the scar when it is fully healed in a few months. Best of luck

Usually knocking off a scab accidentally should not be a problem in the healing of the wound.  A new scab should form in its place until further healing takes place.  Make sure to follow your dermatologist's wound care instructions to insure optimal healing of the area.