Hi im 18 years old and about a week ago I noticed that I had dark rings around my nipple area. Whenever I touch the nipple itself its sore. I had my period from the 10th to the 14th. I waited all this week and its still occuring. I have a little bit of cramping down below as well. I have been having unprotected sex with my boyfriend. Could this mean pregnacy? I took a test and it was negative. What should I do.