So usually I'm very regular to the point where I start on the same day of every month and typically have a 7 day flow. Typical first three days heavy then the rest regular to light. This month I started right on the nose and it seemed to start out as a normal period, except it seems to have been cut short as I was only heavy for a day and then just medium to light flow for yesterday and today with my period coming to a halt. Is there something wrong? Is this normal?