Can anybody tell me why my boobs keep being sore in tender all the time in keep having really bad…

Can anybody tell me why my boobs keep being sore in tender all the time in keep having really bad lower back pain i having had a period yet but it's been 39 days since I had a period in all the pregnant test keep saying negative so ion know wats going on I keep having all the symptoms of pregnancy but sense my miscarriage I had never got no period in I go to the doctor but to do a blood test negative so ion know it been a mouth in a half in tell no period ugh 😑 🙄🙄😩😩😩