red, rashy, titty

Em

My right titty and nipple hurt like a mother fucker... like very sensitive, not really painful ig... my right nipple also seems swollen? Idk. But it was definitely very red, rashy, and irritated earlier all around my boob. I haven't been wearing a bra all day and I went outside in the cold, but it was red, irritable, and the nipple was weird way before that. Any thoughts?