Sore nipples with white spots and purple circle around areola?

For the past couple of weeks my nipples have been really sore, i wont even let my boyfriend touch them. I also noticed white dots on the tip of the nipple. Then yesterday, i noticed a dark purpley kind of circle around the edge of my areola. My period is due anytime now so couls it just be due to that or could it be pregnancy or even something else? Answers would be much appreciated. Thanks.