What could it be?

Greetings all,

I'm 30 years old with a 6 years old daughter. I have concerns about my breast...one in particular. 

My right breasts is extra itchy, warm when my arm touches it and feels like something is leaking from the nipple, but I only feel this...nothing is seen. My breasts are big and always has been, but my right breast seems fuller and that nipple is super sensitive. What could be happening to me? I stood in front of the mirror and saw red rash-like spots and when I try to rub (not scratch) my nipple area, it feels rough, not smooth like my left nipple. I apologize if this is TMI, but I'm concerned and have lost too many of my family to different types of cancer and have a family friend who's too close to being related who's battling breast cancer as well. 

Please tell me if the itchiness, redness, more heaviness and the roughness is not signs of cancer because I know you all can't diagnose me, but my kiddo needs her mom. Thank you in advance!