29 yo. Annoying mole 3 inches down from my arm pit approx 1-2mm. It sat exactly at my bra strap so it was irritated. Dr. Shaved it off two months ago, came back normal/benign. Yesterday I noticed it's growing back a little. The scar is a perfect circle and almost a perfect line of dark brown pigment runs through it (like original color). Since it is flat, its no longer irritated by my bra. Is it safe to leave it? Should I get it checked for melanoma again? Little nervous but hopeful it's normal