2.5 tablespoons of blood per period

lilly

so I just did the quiz on here about periods and it said 2.5 table spoons of blood per period, well I use a cup and fill it in half a day so I know I have more than 2.5 tablespoons, I went to the Dr and they told me my body is rejecting my period and it's just heavy and not to worry. anyone else have this problem. I also get very sick while on my period.