So on 8/20-8/25 I had my period but now only 8 days from the last day of my period I have it again (my period is usually 25-27 days apart) . Later I had period cramps & felt sick. And this morning I woke up and I was bleeding like a period and I felt like crap all day. But around 7-8 ish pm the bleeding stopped and it has been kind of on and off all day. What can it be?