I'm 21 years old. I'm NOT on birth control. I am NOT pregnant, and there is no way possible for me to be. I haven't had sex in 7 months. My nipples have been so sensitive, incredibly sore, even more so when they get hard from being cold. I have weird nipples. Right one is inverted, but the left one is usually flat. They can both be outties at times. I'm not sure if that will help with my question at all, but thought I'd share it just in case. It hurts at all times. It hasn't stopped for months. It's not because I'm ovulating. I have PCOS, and I rarely, if at all, ovulate. 

What could be wrong? What might help to sooth them?