Laser mole removal left me with a hole in my forehead, help!

I recently had a mole removed that was on my forehead it was slightly raised not very big but it was coloured. I had it removed via laser and the scab fell off two weeks later. There is no redness it is the same colour as my skin but it has left a dent in my skin. The plastic surgeon is very sure that he has left enough tissues behind for it to heal up but to me it doesn't look like it will heal anytime soon. It's been 3 weeks since the procedure, is it normal for there to be a dent in the skin?