This is very similar to my current experience, except my 6mm nodule was pinkish/red because it was amelanotic. I am still waiting for the biopsy results. The dermatologist said he thought it may be a Spitz Nevus or a Dermatofibroma. Although the Spitz Nevus part has me paranoid because I have read about them being misdiagnosed and actually being melanoma. Especially since this nevus appeared in my 40s. The derm said they are waiting on a second opinion, possibly because the lab thought it was borderline, which makes me even more anxious. I would get a second opinion. It wouldn’t hurt and it may put your mind at ease.