Sore Breasts, Nausea, etc, Please Assist.

Stephanie • Married two years. One son from first marriage and ttc! Have been trying for a year and now using this app!
I am wondering. I normally get sore breasts a few days before my period. However I am only 3DPO and I'm not due for AF until the 25th and my nipples are so sore I can barely touch them. I also have been having pretty bad nausea for two days now, on and off, and an uncomfortable soreness ( for a lack of a better description) in my pelvic region. Any thoughts?