Hi Im Bethany, my question is: my period is due on the 28th Aug, but for last 3 weeks I have been…

Hi Im Bethany, my question is: my period is due on the 28th Aug, but for last 3 weeks I have been suffering from swollen, tingly nipples. My breasts only started becoming tender since yesterday. Its not a normal pms symtom for me? What causes this? Not sure If im allowed to show a pic of what my nipples look like but pls let me know.