A few months ago I had a period around the middle of the month in August. Then about 2 weeks later I had another period. After that my periods have been coming at the end of the month. Well, this time, I had a period the last Friday of October and it lasted until the 5th of November. Well, today my period is back. Does anyone have any idea of what's going on with my body? I thought maybe I was pregnant last month cause my period was a few days late. But the test was negative. Good thing cause I had a tubal ligation 3 yrs ago. I just don't know what is going on with my body and hopefully someone can give me some answers cause the doctors aren't much help.