is this a symptom of endometriosis?

i was recently diagnosed with endometriosis and ive always had bad pelvic pain and terrible cramps with my period. it’s is due tomorrow and my breasts have been EXTREMELY tender and hurt even when i’m not doing anything. Is this a normal symptom?? it’s to the point where it’s absolutely unbearable and no matter what i do im in pain. is this part of endometriosis or could it be something else??