Menstruation

Ladies I'm having issues. For the past 5 months when my period comes on, it goes off and then a week later I start back bleeding to the point  I have to wear a pad as if it's my period. I had one situation where I thought I had to pee but it was all blood. When this is happening I experience pain worse than my period cramps and it's in my lower abdomen and back. It hurts so bad that I can't sleep at night and painkillers aren't working.