Needing Some Advice!!!

Candace

My periods have always been very heavy, two days before my boobs get sore, I get headaches and diarrhea. I have one day of spotting then 6 days of heavy flow, with horrible cramps. This go around my boobs were sore 10 days ago but are fine now, no headaches and no diarrhea. I have been spotting brown discharge lightly for 4 days and no other symptoms.....What is going on? I took a test and it was negative!!! Help any ideas?