what the...?

So for just over two weeks now I've had sore nipples. I had my period three days after I started getting sore nipples and I never get sore nipples for more than two to three days before and I never get them after. I've also had neusea which is something I never get and the thought of certain foods were making it worse. It's been two weeks and my nipples still hurt! Any idea why this is because I'm not pregnant I've had my period but this never happens to me. Thank you. Please help!