Should I be worried and go get this spot checked out?

[Chelsebrooks73]

Hi,  so I recently noticed a dark discoloration right below by belly button. It's not itchy or anything. I feel like it has a little dry texture. I will insert the link to the photo on my page. In the picture you can see that I have a tiny birthmark or at least thats what I think it looks like. I just don't know if I've always had it. What caught my attention, was the huge discoloration around it. You can kind of see the square shape. I do have a congenital nevus and my dermatologist told me its benign. I've heard those with nevi have a higher risk of getting melanoma so thats why I'm worried.. Please let me know if I should go get it checked out.

Link: https://www.medhelp.org/user_photos/list/20899514?personal_page_id=6046365