Brownish Spots Around Breast..? Please help me.

So I made a previous post about this and nobody really saw it so I'm going to keep posting until I get an answer. I have these brownish spots around my inner breast that have been here around 2 weeks. They are painless but I'm getting a little worried because they are getting darker and darker. I really don't know what this could be because I don't tan nor have the desire to and I'm just getting worried. Please comment what you think it may be. I just really don't know and need some help...