Sore breasts for 2 weeks. AF due 8/22.

Kimberly
AF is due 8/22. I have been having VERY sore breasts for about 2 weeks now. They feel heavy and look fuller too. It started a couple days before my ovulation period. I assumed they were sore because of that. I have never experienced sore breasts during ovulation before. However my ovulation period has been over for almost a week now and the soreness has continued. I don't want to read too much into it & get too excited thinking it could be pregnancy since it started before I ovulated. And it's only 4 DPO, so even if I were, it would be too early to detect, right? Any thoughts on what this could be? This is the first time they have been this sore and for this long.