I am glad you are keeping an eye on it and recognized that it has changed. My advice to you would be to see a dermatologist since you have noted changes. It's always a good idea to have any changes checked out.
I am including an article with a very helpful graphic. It's a great tool to have on hand when doing self-checks.
https://skincancer.net/clinical/abcdes-melanoma
Please keep us posted. We are here for you!
April, SkinCancer.net, Moderator