Please help if you can

Laura • Married 30/8/14, little boy lochlan
Hello ladies, I posted about this a few days ago about having sore nipples right after ovulation, I'm now 4dpo and they are getting worse. I have never had them being sore after ovulation only right before AF is due so I'm confused. They are sore in the nipples and are slightly sore on the sides and they throbe a bit sorry if tmi :( 
Has anyone had this before and it was a positive sign? Obviosly I'm too early to test but could this just be a good thing? Or just normal. I'm on the. We've of taking pain meds because they hurt boo hoo!