Every Month I Have Abnormal Periods. I'm Now Experiencing Bloating,

Every month I have abnormal periods. I'm now experiencing bloating, like I'm full and my stomachs "growling" all the time. My lower abdomen is hard. I was constipated but now its diarrhea. Lower back pains. I took a few tests, some were invalid 2 were negative. I'm nauseas' alot. If something stinks at the time it makes it worse. I did the finger check, there is discharge.