There are various things that would cause 15 day heavy period. In most cases, this is as a result of hormonal imbalance an this needs urgent medical attention.
Poor nutrition or stress.
Some do have their period heavy the first day because since a month past it is taking everything out it deppens of that persons body
It is difficult to willingly postpone your period for day. For some women, heavy exercise may delay their period.
It's not unusual for the amount of flow from your period to vary from hour to hour or day to day. This is a common pattern that women report.
Matter of hours, up to a day depending how heavy your period is.
It could, and that's a fairly common occurrence.
OF COURSE. Heavy flow can go on for a while. This is ALL natural! Don't worry, depending how long your period lasts, you could have heavy flow for the whole thing.
i don't believe you can do anything if their is more blood in there then you wont stop your period until it gone.
is your period normally 4 to 5 days
Usually, that close to a period sex will cause a delay in the period for a day or two.
Not really. I suggest that it is your period. Not all periods are long or heavy some only last a day or two. You don't say if you are on a pill or not. This could make a difference if you have started the pill. If you are young and just started your period it takes time to settle down as well. There are many factors besides pregnancy that can cause a period to be light, heavy, or short.
See an OBGYN.