I have a doctors appointment for tomorrow morning, I have also been throwing up and my breast are sore. My boyfriends brother asked him was I pregnant.
If I were you I would go to a doctor to rule out a cyst or something... They can cause lower back pain. And as far as the bleeding that would be a flag as well, maybe you could have fibroid tumors, my step-mother had them and would bleed on and off all the time, just don't wait for it to go away, take care of yourself and go to a doctor.