So I had AF on April 5th and it only lasted 5 days but is usually 7 or 8. Then on the 18th I got brown blood when I wiped and it got a bit heavier. Not enough to soak pad but enough to need on. Then on the 19th it became bright red blood with mild cramping. The 20th I started seeing little black dots in the red blood like coffee grounds and was nauseous all day with diarrhea. 3 days now of red blood. Is this another period, am i finishing the last one? I'm 41, and am ttc. What is going on?