Am I under any risk that i should know about?

I have a congenital melanocytis nevus, that has hypertrichosis. So this is called a giant hairy neiva, less than .85% of people in the united states has this. When I was in 3rd I had it removed for a high risk of melanoma. It grew back. I had it removed again when I was in 5th grade for another high risk of melanoma. I am now in 8th grade almost in 9th. It has grown back but it is different. It is a lighter color, smaller, and growing much slower this time. It is because it is doing something different that I am so concerned. Luckily the first two times I didn't have Cancer but now since its different I am concerned. Please. Tell me anything you know!!!