Hello! I have some small light/medium brown moles that have been changing over the past three months. (Before circular, now the edges are blurry and asymmetrical). 3 days ago a small black circle appeared on my toe- seemingly under the skin. I thought it might be a little blood blister, but now I m wondering if this could all be related to melanoma or other skin cancer problem. I am in my early twenties, female, and almost never wear sunscreen. (I am fair skinned but hardly ever tan or burn). Thank you!