Summarize the following:
One of the main signs of heavy bleeding (also called menorrhagia) is having blood clots in your flow. For this diagnosis, blood clots the size of a quarter or larger are considered to be connected to heavy bleeding. Check your pad, tampon, and the toilet for blood clots.  Blood clots will look like regular menstrual blood, except they will be more solid, almost jelly-like. Smaller blood clots are normal, and you don't need to worry about them. If you're changing your pad or tampon more often than every 2 hours, you have what's known as heavy bleeding. Heavy bleeding can prevent you from doing things you love, if you're constantly worried about overflow. For instance, if you're changing your pad or tampon every hour (for several hours in a row) and its soaked each time, that's considered heavy bleeding. Generally, periods last 3 to 5 days, though 2 to 7 days is also fairly normal. If your period is lasting longer than 10 days at a time (that is, if you're bleeding for that long), that is a sign that you're having heavy bleeding. Cramping can also be a sign of heavy bleeding. As noted, large blood clots are a symptom of heavy bleeding. These blood clots can be difficult to pass, causing heavier cramping. Therefore, if you notice heavy cramping, that could also be a sign of heavy bleeding. Anemia is when you don't have enough iron in your blood. It often occurs in people who lose large amounts of blood. Usually, the main symptoms are tiredness and lethargy, as well as feeling weak. "Anemia" can actually refer to any type of vitamin deficiency, but generally, low iron is the most common when it comes to menstruation problems.

Summary:
Look for blood clots. Notice how often you change your pad or tampon. Pay attention to the length of your period. Look for cramps. Watch for the symptoms of anemia.