Weirdly colored mole

Okay so I've had this mole on the side of my breast since before I got pregnant. But it was smaller and darker. But after I got pregnant it got bigger and lighter along the outside, with dark on the inside, and I just looked again and now there's pink on the part of the light around the outside. And I am freaking out. The earliest I can get into a dermatologist is the 12th.

What could this be?😩