A mole I had removed has grown back and is itchy. Should I go see my dermatologist again? (photos)

I went to my dermatologist about 6 months ago to ask her about a mole I had on my leg. She didn't like how it looked and did a shave biopsy of it, which came back benign. Well about 2 months ago I noticed it had grown back, but in a different shape. During the last month I've noticed the center has become raised and darker, and sometimes it itches. Is this normal, or should I make another appointment with my dermatologist? I have a picture of the original mole and two of the regrown mole.